# A151407 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 2
4 8
5 21
6 56
7 180
8 537
9 1642
10 5428
11 16894
12 56073
13 184644
14 608722
15 2060761
16 6912591
17 23511436
18 80469490
19 275394728
20 951992172
21 3293896039
22 11446970617
23 39969401778
24 139770090303
25 490850856487
26 1727806323657
27 6096204817107
28 21572269339099
29 76472370379535
30 271723970484170
31 967416967381241