# A083002 (b-file synthesized from sequence entry)
1 2
2 6
3 30
4 210
5 4290
6 43890
7 510510
8 53501910
9 1487683470
10 64790866140
11 530514844860
12 126408523110870
13 3425113062060690
14 660393717163700520
15 26657280574571657010
16 3448055881024876471350
17 308480161111936386482910