# A150183 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 20
4 80
5 294
6 1168
7 4700
8 19616
9 80936
10 341652
11 1451138
12 6240682
13 26900956
14 116808978
15 509503870
16 2235781132
17 9846065742
18 43506965704
19 192855619628
20 857932000186
21 3827546695256
22 17114951919858
23 76699514623644
24 344535118116958
25 1551000876073158
26 6994631039368602
27 31595691327084332