A037667 Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0.

3, 14, 56, 227, 910, 3640, 14563, 58254, 233016, 932067, 3728270, 14913080, 59652323, 238609294, 954437176, 3817748707, 15270994830, 61083979320, 244335917283, 977343669134, 3909374676536, 15637498706147, 62549994824590, 250199979298360, 1000799917193443

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Index entries for linear recurrences with constant coefficients, signature (4,0,1,-4).

Formula

G.f.: x*(3+2*x) / ( (x-1)*(4*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

Example

Terms in base 4: 3, 32, 320, 3203, 32032, 320320, 3203203, 32032032, 320320320, ... .

Crossrefs

Sequence in context: A026544 A026527 A037786 * A111468 A052412 A353095

Adjacent sequences: A037664 A037665 A037666 * A037668 A037669 A037670

Keyword

nonn,base,easy

Author

Clark Kimberling

Status

approved