# A056603 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 6
5 30
6 210
7 210
8 210
9 2310
10 30030
11 30030
12 510510
13 9699690
14 223092870
15 223092870
16 223092870
17 6469693230
18 200560490130
19 200560490130
20 7420738134810
21 304250263527210
22 13082761331670030
23 614889782588491410