# A089708 (b-file synthesized from sequence entry)
1 1
2 2
3 3
4 7
5 26
6 136
7 887
8 6785
9 59116
10 576528
11 6215729
12 73368729
13 940718528
14 13016462714
15 193285275705
16 3065510539375
17 51713071208774
18 924496937994286
19 17458742846249615
20 347270877144570683
21 7256791451501057782