# A011272 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 13 4 64 5 339 6 1885 7 10851 8 64109 9 386510 10 2368354 11 14706331 12 92337618 13 585239903 14 3739309053 15 24059542845 16 155756019048 17 1013801283133 18 6630587014935 19 43553555324502