# A307125 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 4
4 17
5 123
6 1052
7 10568
8 125750
9 1726189
10 26730394
11 460982300
12 8766443952
13 182229703043
14 4110207945794
15 99970680376908
16 2608221938476016
17 72656914458625593
18 2152355976206481570
19 67562405794276542004
20 2240111797037473955984
21 78229640115171735522015
22 2870092624821982184377202