# A250307 (b-file synthesized from sequence entry)
0 1
1 3
2 10
3 37
4 152
5 690
6 3422
7 18257
8 103144
9 608730
10 3713524
11 23235490
12 148281656
13 961255200
14 6311395814
15 41878914665
16 280365966232
17 1891270498050
18 12842102343820
19 87703053156406
20 601999871121200
21 4150859861430252
22 28736613316786220
23 199671324115916570