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A037659
Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2.
0
3, 30, 302, 3023, 30230, 302302, 3023023, 30230230, 302302302, 3023023023, 30230230230, 302302302302, 3023023023023, 30230230230230, 302302302302302, 3023023023023023
OFFSET
1,1
FORMULA
G.f.: x*(3+2*x^2) / ( (x-1)*(10*x-1)*(1+x+x^2) ). - R. J. Mathar, Aug 04 2013
PROG
(PARI) Vec(x*(3+2*x^2)/((x-1)*(10*x-1)*(1+x+x^2)) + O(x^25)) \\ Jinyuan Wang, Apr 14 2020
CROSSREFS
Sequence in context: A037764 A037652 A037771 * A131586 A163475 A200142
KEYWORD
nonn,base,easy
STATUS
approved