# A099524 (b-file synthesized from sequence entry)
0 1
1 5
2 25
3 126
4 635
5 3200
6 16126
7 81265
8 409525
9 2063751
10 10400020
11 52409625
12 264111876
13 1330959400
14 6707206625
15 33800145001
16 170331684405
17 858365628650
18 4325628288251
19 21798473125660
20 109850731256950
21 553579284573001