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A037733 Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,0,3. 1
2, 15, 105, 738, 5168, 36177, 253239, 1772676, 12408734, 86861139, 608027973, 4256195814, 29793370700, 208553594901, 1459875164307, 10219126150152, 71533883051066, 500737181357463, 3505160269502241 (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 (7,0,0,1,-7).

FORMULA

a(n) = 7a(n-1) + a(n-4) - 7a(n-5).

G.f.: ( x*(2+x+3*x^3) ) / ( (x-1)*(7*x-1)*(1+x)*(1+x^2) ). - R. J. Mathar, Oct 14 2015

CROSSREFS

Sequence in context: A215643 A295268 A037524 * A308938 A037556 A037492

Adjacent sequences:  A037730 A037731 A037732 * A037734 A037735 A037736

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 20 02:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)