# A195580 (b-file synthesized from sequence entry)
1 4
2 600
3 2600
4 15996
5 2460800
6 10652800
7 65552004
8 10084355800
9 43655173800
10 268632095996
11 41325687609600
12 178898891577600
13 1100854263840004
14 169352657739783000
15 733127614029833000
16 4511300504584239996
17 694007150091943126400