OFFSET
1,2
LINKS
FORMULA
G.f.: x*(1+2*x+3*x^2) / ( (x-1)*(6*x-1)*(1+x+x^2) ). - R. J. Mathar, Apr 27 2015
MATHEMATICA
nn=30; With[{c=PadRight[{}, nn, {1, 2, 3}]}, Table[FromDigits[Take[c, n], 6], {n, nn}]] (* Harvey P. Dale, Aug 25 2012 *)
PROG
(PARI) a(n)=([0, 1, 0, 0; 0, 0, 1, 0; 0, 0, 0, 1; -6, 1, 0, 6]^(n-1)*[1; 8; 51; 307])[1, 1] \\ Charles R Greathouse IV, Feb 13 2017
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved