# A077612 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 12
5 48
6 720
7 4320
8 60480
9 483840
10 7257600
11 72576000
12 1197504000
13 14370048000
14 261534873600
15 3661488230400
16 73229764608000
17 1171676233728000
18 25609494822912000
19 460970906812416000
20 10948059036794880000
21 218961180735897600000
22 5620003638888038400000