# A152421 (b-file synthesized from sequence entry)
1 1
2 4
3 126
4 12870
5 3268760
6 3796297200
7 3348108992991
8 19619725782651120
9 95399637739311016800
10 1917353200780443050763600
11 7359958875023243471254188840
12 3720132147124647210937719983999040