A068040 Number of subsets of {1,2,3,...,n} that sum to 0 mod 19.

1, 1, 1, 1, 1, 1, 2, 7, 14, 27, 54, 108, 216, 431, 862, 1724, 3450, 6899, 13798, 27596, 55190, 110378, 220754, 441506, 883010, 1766020, 3532046, 7064092, 14128182, 28256364, 56512728, 113025456, 226050910, 452101820, 904203640, 1808407284