# A018795 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 1 11 3 12 8 13 20 14 48 15 112 16 256 17 576 18 1280 19 3280 20 7968 21 17840 22 39487 23 86587 24 188396 25 407230 26 875320 27 1872332 28 4218648 29 9382099 30 20646176 31 44125836 32 93902740