# A137737 (b-file synthesized from sequence entry)
1 0
2 1
3 0
4 30
5 0
6 13560
7 0
8 27785520
9 0
10 162030637440
11 0
12 2156625389318400
13 0
14 56857271240920550400
15 0
16 2686506065987036477184000
17 0
18 211180868835057744408834048000
19 0
20 26072812428113877344085395644416000
21 0