The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A131757 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A131757

Period 10: repeat 3, 3, 3, -7, 3, 3, -7, 3, 3, -7.
(history; published version)

#11 by Joerg Arndt at Tue Dec 12 09:25:43 EST 2023

STATUS

proposed

approved

#10 by Paolo P. Lava at Tue Dec 12 09:24:45 EST 2023

STATUS

editing

proposed

#9 by Paolo P. Lava at Tue Dec 12 09:24:42 EST 2023

FORMULA

a(n)=-(n mod 10)+[(n+1) mod 10]-[(n+3) mod 10]+[(n+4) mod 10]-[(n+6) mod 10]+[(n+7) mod 10], with n>=0. - Paolo P. Lava, Oct 08 2007

STATUS

approved

editing

#8 by Harvey P. Dale at Tue Aug 07 10:30:16 EDT 2018

STATUS

editing

approved

#7 by Harvey P. Dale at Tue Aug 07 10:30:13 EDT 2018

MATHEMATICA

PadRight[{}, 120, {3, 3, 3, -7, 3, 3, -7, 3, 3, -7}] (* Harvey P. Dale, Aug 07 2018 *)

STATUS

approved

editing

#6 by Charles R Greathouse IV at Wed Jul 13 00:45:29 EDT 2016

STATUS

editing

approved

#5 by Charles R Greathouse IV at Wed Jul 13 00:45:26 EDT 2016

LINKS

<a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (-1,-1,-1,-1,-1,-1,-1,-1,-1).

PROG

(PARI) a(n)=[3, 3, 3, -7, 3, 3, -7, 3, 3, -7][n%10+1] \\ Charles R Greathouse IV, Jul 13 2016

KEYWORD

sign,easy

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 18:53:36 EDT 2012

FORMULA

a(n)=-(n mod 10)+[(n+1) mod 10]-[(n+3) mod 10]+[(n+4) mod 10]-[(n+6) mod 10]+[(n+7) mod 10], with n>=0. - _Paolo P. Lava (paoloplava(AT)gmail.com), _, Oct 08 2007

Discussion

Fri Mar 30

18:53

OEIS Server: https://oeis.org/edit/global/262

#3 by Russ Cox at Fri Mar 30 18:51:52 EDT 2012

AUTHOR

_Paul Curtz (bpcrtz(AT)free.fr), _, Oct 04 2007

Discussion

Fri Mar 30

18:51

OEIS Server: https://oeis.org/edit/global/249

#2 by T. D. Noe at Wed Sep 28 20:49:16 EDT 2011

FORMULA

a(n)=-(n mod 10)+[(n+1) mod 10]-[(n+3) mod 10]+[(n+4) mod 10]-[(n+6) mod 10]+[(n+7) mod 10], with n>=0. - Paolo P. Lava (pplpaoloplava(AT)splgmail.atcom), Oct 08 2007

Discussion

Wed Sep 28

20:49

OEIS Server: https://oeis.org/edit/global/96