# A251666 (b-file synthesized from sequence entry)
0 1
1 5
2 74
3 2028
4 83352
5 4607496
6 321156000
7 27064420704
8 2677510124928
9 304299947999232
10 39075730095810816
11 5595805388119057920
12 884245579070535235584
13 152843879008651568329728
14 28688663318934190485491712
15 5811091829207760774331662336
16 1263471121829937070180445552640