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A037715 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3,2,0. 0
1, 13, 132, 1320, 13201, 132013, 1320132, 13201320, 132013201, 1320132013, 13201320132, 132013201320, 1320132013201, 13201320132013, 132013201320132, 1320132013201320 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
G.f.: x*(1+2*x) / ( (x-1)*(10*x-1)*(x^2+1) ). - R. J. Mathar, Aug 04 2013
a(n) = 11*a(n-1) - 11*a(n-2) + 11*a(n-3) - 10*a(n-4). - Wesley Ivan Hurt, Sep 06 2022
PROG
(PARI) Vec(x*(1+2*x)/((x-1)*(10*x-1)*(x^2+1)) + O(x^25)) \\ Jinyuan Wang, Apr 14 2020
CROSSREFS
Sequence in context: A293580 A295349 A161498 * A037617 A295603 A199144
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)