# A151485 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 20
4 95
5 432
6 2100
7 10429
8 52990
9 273872
10 1435464
11 7610704
12 40747432
13 219972284
14 1196042952
15 6543872976
16 36000272857
17 199016494848
18 1104987607068
19 6159118520824
20 34451516940832
21 193323839813568
22 1087995843781768
23 6139413903894528
24 34728866786674200
25 196895381265884724