# A360786 (b-file synthesized from sequence entry)
1 0
2 2
3 42
4 400
5 2840
6 17376
7 97440
8 516608
9 2634624
10 13058560
11 63320576
12 301707264
13 1417009152
14 6575120384
15 30195425280
16 137430827008
17 620604391424
18 2783097520128
19 12403773407232
20 54975376916480
21 242441862512640
22 1064326263734272
23 4653131038195712
24 20266193591992320