# A167984 (b-file synthesized from sequence entry)
3 0
4 0
5 720
6 0
7 0
8 3600
9 2400
10 4320
11 28800
12 35400
13 64800
14 284400
15 540000
16 1139400
17 3708000
18 8557200
19 19677600
20 55725120
21 140359200
22 346456800
23 935942400
24 2442469200
25 6282571680