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A037548 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2. 0
1, 9, 65, 456, 3194, 22360, 156521, 1095649, 7669545, 53686816, 375807714, 2630654000, 18414578001, 128902046009, 902314322065, 6316200254456, 44213401781194, 309493812468360, 2166456687278521 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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*(1+2*x+2*x^2) / ( (x-1)*(7*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 30 2015

CROSSREFS

Sequence in context: A081040 A102902 A127534 * A238275 A287816 A036731

Adjacent sequences:  A037545 A037546 A037547 * A037549 A037550 A037551

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 22 18:49 EDT 2021. Contains 345388 sequences. (Running on oeis4.)