The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A206399 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A206399

a(0) = 1; for n>0, a(n) = 41*n^2 + 2.
(history; published version)

#34 by Charles R Greathouse IV at Thu Sep 08 08:46:01 EDT 2022

PROG

(MAGMAMagma) [n eq 0 select 1 else 41*n^2+2: n in [0..39]];

(MAGMAMagma) I:=[1, 43, 166, 371]; [n le 4 select I[n] else 3*Self(n-1)-3*Self(n-2)+Self(n-3): n in [1..41]]; // Vincenzo Librandi, Aug 18 2013

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#33 by Susanna Cuyler at Sat Dec 19 08:37:15 EST 2020

STATUS

reviewed

approved

#32 by Michel Marcus at Sat Dec 19 01:21:42 EST 2020

STATUS

proposed

reviewed

#31 by Wesley Ivan Hurt at Fri Dec 18 20:06:33 EST 2020

STATUS

editing

proposed

#30 by Wesley Ivan Hurt at Fri Dec 18 20:06:28 EST 2020

FORMULA

a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n >= 4. - Wesley Ivan Hurt, Dec 18 2020

STATUS

approved

editing

#29 by Bruno Berselli at Mon Feb 26 08:45:36 EST 2018

STATUS

editing

approved

#28 by Bruno Berselli at Mon Feb 26 08:45:34 EST 2018

FORMULA

GO.g.f.: (1 + x)*(1 + 39*x + x^2)/(1 - x)^3.

STATUS

approved

editing

#27 by Charles R Greathouse IV at Thu Sep 24 11:07:31 EDT 2015

STATUS

editing

approved

#26 by Charles R Greathouse IV at Thu Sep 24 11:07:29 EDT 2015

PROG

(PARI) a(n)=if(n, 41*n^2+2, 1) \\ Charles R Greathouse IV, Sep 24 2015

STATUS

approved

editing

#25 by Bruno Berselli at Wed Jul 22 05:27:21 EDT 2015

STATUS

editing

approved