# A308543 (b-file synthesized from sequence entry)
0 1
1 4
2 24
3 176
4 1504
5 14528
6 155520
7 1819392
8 23019008
9 312413184
10 4518705152
11 69279690752
12 1120856170496
13 19062628335616
14 339681346551808
15 6323658075340800
16 122680376836358144
17 2474677219852288000
18 51799971194270646272
19 1123121391647711035392