# A375945 (b-file synthesized from sequence entry) 0 1 1 3 2 18 3 156 4 1758 5 24342 6 399480 7 7577700 8 163090500 9 3926104860 10 104520733560 11 3048811591680 12 96695722690200 13 3312942954681240 14 121938065727180480 15 4798400761979259120 16 201030443703421854480 17 8933622147642363338160 18 419725992843354254228640