# A149018 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 35
5 129
6 520
7 2099
8 8807
9 37088
10 159794
11 690849
12 3030304
13 13335930
14 59258020
15 264113060
16 1185147895
17 5332540349
18 24112886920
19 109297185243
20 497282246389
21 2267352943686
22 10368466205267
23 47503254404371
24 218152741334750
25 1003498005664967
26 4625071542555164
27 21347976628985857