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A037642

Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1.

2, 17, 120, 842, 5897, 41280, 288962, 2022737, 14159160, 99114122, 693798857, 4856592000, 33996144002, 237973008017, 1665811056120, 11660677392842, 81624741749897, 571373192249280, 3999612345744962

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (7,0,1,-7).

FORMULA

G.f.: x*(x+2)*(1+x) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

MATHEMATICA

Module[{nn=20, p}, p=PadRight[{}, nn, {2, 3, 1}]; Table[FromDigits[Take[p, n], 7], {n, nn}]] (* or *) LinearRecurrence[{7, 0, 1, -7}, {2, 17, 120, 842}, 20] (* Harvey P. Dale, Jul 17 2013 *)

CROSSREFS

Sequence in context: A037747 A037628 A037754 * A161128 A220403 A097716

Adjacent sequences: A037639 A037640 A037641 * A037643 A037644 A037645

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

URL: https://oeis.org/A037642

⇱ A037642 - OEIS