# A226998 (b-file synthesized from sequence entry)
1 0
2 1
3 18
4 288
5 5000
6 97200
7 2117682
8 51380224
9 1377495072
10 40500000000
11 1296871230050
12 44952006426624
13 1677462128818632
14 67068898339975168
15 2860906750488281250
16 129703669268270284800
17 6228632560085359165568
18 315864220382241648869376
19 16868630748261621128320242