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A037556 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,1. 0
2, 15, 106, 744, 5209, 36464, 255250, 1786751, 12507258, 87550808, 612855657, 4289989600, 30029927202, 210209490415, 1471466432906, 10300265030344, 72101855212409, 504712986486864, 3532990905408050 (list; graph; refs; listen; history; text; internal format)
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*(2+x+x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

MATHEMATICA

nn=30; With[{c=PadRight[{}, nn, {2, 1, 1}]}, Table[FromDigits[Take[c, n], 7], {n, nn}]] (* Harvey P. Dale, May 05 2012 *)

CROSSREFS

Sequence in context: A037524 A037733 A308938 * A037492 A037572 A218686

Adjacent sequences:  A037553 A037554 A037555 * A037557 A037558 A037559

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 17 11:02 EST 2019. Contains 329226 sequences. (Running on oeis4.)