# A341233 (b-file synthesized from sequence entry)
1 1
2 1
3 12
4 96
5 320
6 3840
7 161280
8 516096
9 46448640
10 185794560
11 2270822400
12 163499212800
13 1821848371200
14 51011754393600
15 10712468422656000
16 9794256843571200
17 555007887802368000
18 139861987726196736000
19 1449478781889675264000
20 49059281848573624320000