# A144905 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 74
4 1596
5 58344
6 3240840
7 254535840
8 26862378480
9 3667537480320
10 629083000385280
11 132437508454137600
12 33575888768939193600
13 10090248381797704243200
14 3546915020658948703564800
15 1441883923593020355819571200
16 671220876625092844683849216000
17 354750674999711346878469083136000