# A066584 (b-file synthesized from sequence entry)
1 1
2 15
3 63
4 3
5 315
6 120
7 2268
8 102060
9 241920
10 2953125
11 51438240
12 145212480
13 5290790400
14 76545
15 945
16 15120
17 1071630
18 26127360
19 106312500
20 1050197400
21 95591301120
22 1339231320
23 76204800
24 3135283200
25 3511517184000