# A318495 (b-file synthesized from sequence entry)
0 1
1 10
2 120
3 1540
4 20500
5 279480
6 3876600
7 54496200
8 774468900
9 11107261000
10 160553895040
11 2336799457200
12 34219387524400
13 503846306168800
14 7455357525594000
15 110811908027490960
16 1653792126235140900
17 24774309852363829800
18 372404448149589213600