# A176688 (b-file synthesized from sequence entry)
2 1
3 8
4 44
5 215
6 1028
7 5040
8 25931
9 141394
10 818940
11 5030489
12 32670830
13 223561960
14 1606504121
15 12086613500
16 94951417768
17 777028092855
18 6609770035768
19 58333927746852
20 533203742855027
21 5039919479205198
22 49191925330095240