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#14 by Charles R Greathouse IV at Thu Sep 08 08:44:39 EDT 2022
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(MAGMAMagma) [n le 1 select 1 else ((-12)^n - 1)*Self(n-1)/(-13): n in [1..13]]; // Vincenzo Librandi, Oct 26 2012
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Discussion
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| Thu Sep 08
| 08:44
| OEIS Server: https://oeis.org/edit/global/2944
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#13 by Bruno Berselli at Sat Oct 27 01:41:00 EDT 2012
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#12 by Bruno Berselli at Sat Oct 27 01:40:42 EDT 2012
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prodProd_{k=1}^{k=n} (q^k - 1) / (q - 1)).
a(1) = 1, a(n) = (((-) = ((-12)^n - -1) * )*a(n-1))/(-)/(-13). - Vincenzo Librandi, Oct 26 2012
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| PROG
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(MAGMA) I:=[1]; [) [n le 1 select 1 I[n] else (((- ((-12)^n - 1) * )*Self(n-1))/(-)/(-13): n in [1..13]]; // Vincenzo Librandi, Oct 26 2012
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| STATUS
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approved
editing
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Discussion
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| Sat Oct 27
| 01:41
| Bruno Berselli: Why I:=[1] , Vincenzo? It's unnecessary ---
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#11 by N. J. A. Sloane at Fri Oct 26 23:20:20 EDT 2012
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#10 by Vincenzo Librandi at Fri Oct 26 14:48:30 EDT 2012
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#9 by Vincenzo Librandi at Fri Oct 26 14:48:23 EDT 2012
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<a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>
<a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>
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#8 by Vincenzo Librandi at Fri Oct 26 14:47:38 EDT 2012
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| DATA
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1, -11, -1463, 2333485, 44665236385, -10259202810507035, -28277368892180867021255, 935288538953861649874525071325, 371221802129246962654056875248358359825, -1768082733073463162105209099485375242162416580075
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Vincenzo Librandi, <a href="/A015027/b015027.txt">Table of n, a(n) for n = 1..40</a>
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| FORMULA
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a(1) = 1, a(n) = (((-12)^n - 1) * a(n-1))/(-13). - Vincenzo Librandi, Oct 26 2012
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RecurrenceTable[{a[1]==1, a[n]==(((-12)^n - 1) * a[n-1])/(-13)}, a, {n, 15}] (* Vincenzo Librandi, Oct 26 2012 *)
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(MAGMA) I:=[1]; [n le 1 select I[n] else (((-12)^n - 1) * Self(n-1))/(-13): n in [1..13]]; // Vincenzo Librandi, Oct 26 2012
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| STATUS
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approved
editing
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#7 by Russ Cox at Fri Mar 30 17:20:37 EDT 2012
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Discussion
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| Fri Mar 30
| 17:20
| OEIS Server: https://oeis.org/edit/global/117
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#6 by Russ Cox at Sun Jul 10 18:43:09 EDT 2011
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<a href="/Sindx_index/Fa.html#factorial">Index entries for sequences related to factorial numbers</a>
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Discussion
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| Sun Jul 10
| 18:43
| OEIS Server: https://oeis.org/edit/global/39
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#5 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010
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<a href="="/Sindx_Fa.html#factorial">Index entries for sequences related to factorial numbers</a>
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| KEYWORD
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sign,easy,new
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