%I #6 Aug 27 2018 14:55:10

%S 1,1,1,1,1,1,2,7,14,27,54,108,216,431,862,1724,3450,6899,13798,27596,

%T 55190,110378,220754,441506,883010,1766020,3532046,7064092,14128182,

%U 28256364,56512728,113025456,226050910,452101820,904203640,1808407284

%N Number of subsets of {1,2,3,...,n} that sum to 0 mod 19.

%F Empirical G.f.: -(2*x^19+x^17-2*x^16+x^13+x^9-3*x^7+x^5+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^19-1)). - _Colin Barker_, Dec 22 2012

%Y 19th row of A068009.

%K nonn

%O 0,7

%A _Antti Karttunen_, Feb 11 2002