# A003432 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 3
5 5
6 9
7 32
8 56
9 144
10 320
11 1458
12 3645
13 9477
14 25515
15 131072
16 327680
17 1114112
18 3411968
19 19531250
20 56640625
21 195312500