# A204841 (b-file synthesized from sequence entry)
0 0
1 0
2 16
3 672
4 39936
5 3624960
6 478955520
7 87177646080
8 20922779566080
9 6402373519933440
10 2432902004460748800
11 1124000727695858073600
12 620448401731277448806400
13 403291461126554623829606400
14 304888344611712432172380979200
15 265252859812191015786434789376000