# A227466 (b-file synthesized from sequence entry)
1 1
2 2
3 11
4 96
5 1149
6 17520
7 324855
8 7096320
9 178495065
10 5081045760
11 161485639875
12 5668185600000
13 217773547039125
14 9090267234048000
15 409648199646660975
16 19822083757572096000
17 1025047834112461784625
18 56415976360602034176000
19 3292602426688307236378875