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A037750 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 2,3,0,1. 0
2, 23, 230, 2301, 23012, 230123, 2301230, 23012301, 230123012, 2301230123, 23012301230, 230123012301, 2301230123012, 23012301230123, 230123012301230, 2301230123012301 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Index entries for linear recurrences with constant coefficients, signature (10,0,0,1,-10).

FORMULA

a(n) = 10*a(n-1) + ((n+1) mod 4), with a(0)=0. - Paolo P. Lava, Jul 30 2009

G.f.: ( 2+3*x+x^3 )*x / ( (x-1)*(10*x-1)*(1+x)*(1+x^2) ). - R. J. Mathar, Nov 21 2011

PROG

(PARI) Vec((2+3*x+x^3 )*x/((x-1)*(10*x-1)*(1+x)*(1+x^2)) + O(x^25)) \\ Jinyuan Wang, Apr 14 2020

CROSSREFS

Sequence in context: A036937 A083808 A252016 * A037631 A026075 A037757

Adjacent sequences:  A037747 A037748 A037749 * A037751 A037752 A037753

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 26 11:30 EDT 2022. Contains 354086 sequences. (Running on oeis4.)