A037750 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 2,3,0,1.

2, 23, 230, 2301, 23012, 230123, 2301230, 23012301, 230123012, 2301230123, 23012301230, 230123012301, 2301230123012, 23012301230123, 230123012301230, 2301230123012301

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

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