# A331339 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 32
4 292
5 3294
6 44918
7 714468
8 13002456
9 266275200
10 6060498672
11 151750887936
12 4145522908272
13 122690391196944
14 3910569680464848
15 133549150323123744
16 4864927063250290176
17 188297220693251438208
18 7716800776602560577408