# A117887 (b-file synthesized from sequence entry)
1 1
2 4
3 20
4 145
5 1441
6 18248
7 280392
8 5063361
9 105063361
10 2463011052
11 64380375276
12 1856540769313
13 58550453144609
14 2004745521503984
15 74062339559431920
16 2936485391069247713
17 124376016487663499489
18 5604762874272465685428