A037756 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1,0.

2, 21, 190, 1710, 15392, 138531, 1246780, 11221020, 100989182, 908902641, 8180123770, 73621113930, 662590025372, 5963310228351, 53669792055160, 483028128496440, 4347253156467962

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Index entries for linear recurrences with constant coefficients, signature (10,-10,10,-9).

Formula

G.f.: x*(2+x) / ( (x-1)*(9*x-1)*(x^2+1) ). - R. J. Mathar, May 04 2015

Mathematica

Table[FromDigits[PadRight[{}, n, {2, 3, 1, 0}], 9], {n, 20}] (* or *) LinearRecurrence[ {10, -10, 10, -9}, {2, 21, 190, 1710}, 20] (* Harvey P. Dale, Jan 15 2017 *)

Crossrefs

Sequence in context: A265167 A037749 A037630 * A037644 A329553 A365061

Adjacent sequences: A037753 A037754 A037755 * A037757 A037758 A037759

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved