# A058353 (b-file synthesized from sequence entry)
1 1
2 4
3 12
4 40
5 120
6 396
7 1260
8 4176
9 13788
10 46240
11 155496
12 527160
13 1792804
14 6125028
15 20986020
16 72117632
17 248396792
18 857402748
19 2964896876
20 10269550040
21 35622420288
22 123727866768
23 430254861944
24 1497796242288
25 5219231003500