# A281429 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 5
4 17
5 145
6 865
7 10325
8 88865
9 1357825
10 15335425
11 284963525
12 3993275825
13 87274812625
14 1462392957025
15 36716097543125
16 716611617346625
17 20309401097610625
18 452780458211706625
19 14290053364475013125
20 358439197464543820625
21 12462411363013047060625