# A149625 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 67
5 245
6 1133
7 4649
8 21837
9 94019
10 446511
11 1985665
12 9507117
13 43229887
14 208191147
15 961692903
16 4652119203
17 21745052861
18 105563020121
19 497971021413
20 2424374066045
21 11519846583297
22 56217177871777
23 268699372489945
24 1313867187813781
25 6310262972615505
26 30907720460139209
27 149043710679987423