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A134011 Period 9: repeat [1, 2, 3, 4, 5, 4, 3, 2, 1]. 1
1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,1).

FORMULA

a(n) = (1/324)*{25*(n mod 9)+61*[(n+1) mod 9]+61*[(n+2) mod 9]+61*[(n+3) mod 9]+61*[(n+4) mod 9]-11*[(n+5) mod 9]-11*[(n+6) mod 9]-11*[(n+7) mod 9]-11*[(n+8) mod 9]}, with n>=0. - Paolo P. Lava, Jan 25 2008

a(n) = a(n-9) for n > 8. G.f.: (1 + x + x^2 + x^3 + x^4)^2/(1 - x^9). - Chai Wah Wu, Jun 04 2016

MAPLE

A134011:=n->[1, 2, 3, 4, 5, 4, 3, 2, 1][(n mod 9)+1]: seq(A134011(n), n=0..100); # Wesley Ivan Hurt, Jun 11 2016

MATHEMATICA

PadRight[{}, 81, {1, 2, 3, 4, 5, 4, 3, 2, 1}] (* Harvey P. Dale, Oct 31 2011 *)

PROG

(MAGMA) &cat [[1, 2, 3, 4, 5, 4, 3, 2, 1]: n in [0..8]]; // Wesley Ivan Hurt, Jun 11 2016

CROSSREFS

Cf. A131974.

Sequence in context: A143055 A271751 A017890 * A280913 A035343 A017880

Adjacent sequences:  A134008 A134009 A134010 * A134012 A134013 A134014

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Jan 10 2008

STATUS

approved

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Last modified November 19 08:57 EST 2018. Contains 317348 sequences. (Running on oeis4.)