# A107591 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 91
6 408
7 1939
8 9635
9 49614
10 263140
11 1431301
12 7959568
13 45152340
14 260847526
15 1532825675
16 9154581802
17 55537885743
18 342147577227
19 2140251570508
20 13594688301758
21 87702596534110
22 574815620158265
23 3829029514213952