A037570 Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,2.

2, 11, 57, 287, 1436, 7182, 35912, 179561, 897807, 4489037, 22445186, 112225932, 561129662, 2805648311, 14028241557, 70141207787, 350706038936, 1753530194682, 8767650973412, 43838254867061, 219191274335307, 1095956371676537

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Index entries for linear recurrences with constant coefficients, signature (5,0,1,-5).

Formula

G.f.: x*(2+x+2*x^2) / ( (x-1)*(5*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015

Mathematica

Table[FromDigits[PadRight[{}, n, {2, 1, 2}], 5], {n, 30}] (* or *) LinearRecurrence[{5, 0, 1, -5}, {2, 11, 57, 287}, 30] (* Harvey P. Dale, Jul 04 2024 *)

Crossrefs

Sequence in context: A041129 A332524 A037490 * A240888 A120464 A164581

Adjacent sequences: A037567 A037568 A037569 * A037571 A037572 A037573

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved