# A199481 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 88
6 369
7 1600
8 7122
9 32370
10 149612
11 701046
12 3322671
13 15901030
14 76729203
15 372918345
16 1823872039
17 8969769017
18 44330916829
19 220062127756
20 1096744496191
21 5485585559684
22 27526824797373
23 138542038343946
24 699184051431377
25 3537456038149028
26 17938918589386868