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A033143 Base-7 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0. 1
1, 7, 49, 344, 2408, 16856, 117993, 825951, 5781657, 40471600, 283301200, 1983108400, 13881758801, 97172311607, 680206181249, 4761443268744, 33330102881208, 233310720168456, 1633175041179193, 11432225288254351, 80025577017780457, 560179039124463200, 3921253273871242400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Colin Barker, Table of n, a(n) for n = 1..1000

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

FORMULA

a(n) = 7*a(n-1) + a(n-3) - 7*a(n-4).

G.f.: x / ((1-x)*(1-7*x)*(1+x+x^2)). - Colin Barker, Dec 24 2015

PROG

(PARI) Vec(x/((1-x)*(1-7*x)*(1+x+x^2)) + O(x^30)) \\ Colin Barker, Dec 24 2015

CROSSREFS

Sequence in context: A000420 A050737 A195908 * A024582 A024587 A240721

Adjacent sequences:  A033140 A033141 A033142 * A033144 A033145 A033146

KEYWORD

nonn,base,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 25 06:13 EDT 2017. Contains 288709 sequences.