# A307321 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 30
4 143
5 660
6 3000
7 13448
8 59696
9 262788
10 1148738
11 4989908
12 21551733
13 92596511
14 395921737
15 1685304092
16 7143861196
17 30163965903
18 126895681419
19 531986033218
20 2222961809367
21 9260148591001
22 38461580964389
23 159302487751844
24 658054630483936
25 2711429650817356