# A251591 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 35
4 560
5 14973
6 589743
7 30078048
8 1824041570
9 125400975830
10 9507019477382
11 78070828079199
12 68560287232877740
13 6376178095301876005
14 623169409884847073730
15 636070059202675270255520
16 6745818886029778590765570
17 740194253157571009569356970