# A122748 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 2
4 4
5 8
6 16
7 40
8 72
9 260
10 432
11 1976
12 2880
13 17632
14 23040
15 177248
16 201600
17 2001680
18 2016000
19 24879520
20 21772800
21 338969216
22 261273600
23 5002865792
24 3353011200
25 79676972608
26 46942156800
27 1358997441920
28 697426329600
29 24740358817280
30 11158821273600
31 478218277674496