# A219118 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 24
4 296
5 4280
6 79032
7 1978368
8 57803776
9 1949421888
10 78945675200
11 3678493774560
12 190462000632576
13 11112878148649472
14 730288018660087552
15 52727783838765181440
16 4148774572438335014912
17 358041540338404096024576
18 33700760914469383117799424