# A033643 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 120
6 24
7 144
8 312
9 1080
10 4632
11 24240
12 9264
13 57744
14 134016
15 517536
16 2338176
17 12725952
18 7014528
19 45192384
20 111428352
21 469862208
22 2213733888
23 12478256064
24 8854935552
25 58767959808
26 152955661824
27 693938824704