# A002273 (b-file synthesized from sequence entry)
0 1
1 0
2 98280
3 19138560
4 805208040
5 14651449344
6 156717687840
7 1162883174400
8 6596666916840
9 30507984568320
10 119992701299184
11 414348381296640
12 1283840894706720
13 3635166831206400
14 9523995863722560