# A151394 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 8 5 15 6 44 7 91 8 286 9 633 10 2072 11 4796 12 16180 13 38727 14 133548 15 327895 16 1150226 17 2881857 18 10247072 19 26099008 20 93830568 21 242264113 22 878987980 23 2295723288 24 8393889812 25 22139557300 26 81484257064 27 216757035756 28 802324361696 29 2150196732767 30 7998562017700 31 21576806128743 32 80615634684738