# A111283 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 23
5 96
6 409
7 1751
8 7505
9 32176
10 137956
11 591501
12 2536132
13 10873981
14 46623553
15 199904321
16 857114814
17 3674987126
18 15756967635
19 67559972476
20 289671844661
21 1242004318751
22 5325249092137
23 22832672531956
24 97897943538708