# A108208 (b-file synthesized from sequence entry) 0 0 1 2 2 8 3 56 4 624 5 9536 6 184480 7 4313088 8 118183744 9 3712870400 10 131536027008 11 5187183672320 12 225342288987904 13 10691937463283712 14 550121848577067520 15 30507449271343837184 16 1813943300823318205440 17 115116132876009362358272