# A124534 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 25 4 113 5 608 6 3535 7 21844 8 141809 9 959882 10 6738850 11 48877221 12 365145267 13 2803002587 14 22066904802 15 177881536038 16 1466278969213 17 12345543329079 18 106069531868783 19 929158597546721 20 8292429187449462 21 75348425058995464