A037636 Base 8 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,3.

2, 17, 139, 1114, 8913, 71307, 570458, 4563665, 36509323, 292074586, 2336596689, 18692773515, 149542188122, 1196337504977, 9570700039819, 76565600318554, 612524802548433, 4900198420387467

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Index entries for linear recurrences with constant coefficients, signature (8,0,1,-8).

Formula

G.f.: ( x*(2+x+3*x^2) ) / ( (x-1)*(8*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

Mathematica

With[{c=PadLeft[{}, 21, {2, 1, 3}]}, FromDigits[#, 8]&/@ Table[Take[c, n], {n, 20}]] (* Harvey P. Dale, Sep 30 2011 *)

Crossrefs

Sequence in context: A037493 A037573 A037741 * A163066 A110815 A273340

Adjacent sequences: A037633 A037634 A037635 * A037637 A037638 A037639

Keyword

nonn,base

Author

Clark Kimberling

Status

approved