# A149588 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 55
5 215
6 903
7 3543
8 15115
9 64327
10 277887
11 1187513
12 5267153
13 23088101
14 102403601
15 454033517
16 2045486909
17 9139919249
18 41272851285
19 186370747591
20 847763870523
21 3841656185085
22 17547960265589
23 80086694745269
24 367075570257281
25 1680400471957363
26 7733621668264139
27 35555079620719325