# A149937 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 49
5 168
6 601
7 2222
8 8413
9 32490
10 127623
11 508379
12 2049295
13 8347576
14 34315105
15 142197215
16 593480709
17 2492970426
18 10532763667
19 44735045029
20 190912796011
21 818327919384
22 3521844048879
23 15213485498960
24 65945259177979
25 286766008867558
26 1250736275542481
27 5470315858256517