# A357662 (b-file synthesized from sequence entry)
0 1
1 0
2 3
3 27
4 198
5 1485
6 12825
7 132678
8 1582497
9 20603727
10 284290560
11 4132840239
12 63571690485
13 1038868740000
14 18022911716439
15 330305863479615
16 6355242571945878
17 127721845479277737
18 2672729031195365949
19 58142565625982730462
20 1313557910179640120061