# A117722 (b-file synthesized from sequence entry)
0 1
1 3
2 8
3 34
4 144
5 377
6 1597
7 4181
8 17711
9 75025
10 196418
11 832040
12 3524578
13 9227465
14 39088169
15 102334155
16 433494437
17 1836311903
18 4807526976
19 20365011074
20 53316291173
21 225851433717
22 956722026041
23 2504730781961
24 10610209857723