

A037605


Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,3.


0



1, 7, 38, 191, 957, 4788, 23941, 119707, 598538, 2992691, 14963457, 74817288, 374086441, 1870432207, 9352161038, 46760805191, 233804025957, 1169020129788, 5845100648941, 29225503244707, 146127516223538, 730637581117691
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OFFSET

1,2


LINKS



FORMULA

G.f.: x*(1+2*x+3*x^2) / ( (x1)*(5*x1)*(1+x+x^2) ).  R. J. Mathar, Apr 27 2015


PROG

(PARI) a(n)=([0, 1, 0, 0; 0, 0, 1, 0; 0, 0, 0, 1; 5, 1, 0, 5]^(n1)*[1; 7; 38; 191])[1, 1] \\ Charles R Greathouse IV, Feb 13 2017


CROSSREFS



KEYWORD

nonn,base,easy


AUTHOR



STATUS

approved



