# A115599 (b-file synthesized from sequence entry)
1 2
2 9
3 50
4 289
5 1682
6 9801
7 57122
8 332929
9 1940450
10 11309769
11 65918162
12 384199201
13 2239277042
14 13051463049
15 76069501250
16 443365544449
17 2584123765442
18 15061377048201
19 87784138523762
20 511643454094369
21 2982076586042450
22 17380816062160329
23 101302819786919522