# A005633 (b-file synthesized from sequence entry)
1 0
2 1
3 0
4 2
5 2
6 8
7 14
8 36
9 112
10 216
11 928
12 1440
13 8616
14 11520
15 87864
16 100800
17 997952
18 1008000
19 12427904
20 10886400
21 169435936
22 130636800
23 2501216992
24 1676505600
25 39837528576
26 23471078400
27 679494214656
28 348713164800
29 12370158205568
30 5579410636800
31 239109033342848