# A155613 (b-file synthesized from sequence entry)
0 1
1 6
2 56
3 486
4 4016
5 32526
6 261416
7 2094966
8 16770656
9 134198046
10 1073682776
11 8589757446
12 68718945296
13 549754219566
14 4398041728136
15 35184357739926
16 281474933663936
17 2251799684545086
18 18014398122061496
19 144115186913594406