# A024743 (b-file synthesized from sequence entry)
1 3
2 1
3 2
4 6
5 18
6 54
7 174
8 558
9 1782
10 5694
11 19170
12 64206
13 214050
14 712566
15 2465694
16 8480310
17 29012526
18 99157446
19 348577698
20 1219546278
21 4248000882
22 14773851366
23 52521676254
24 185880813822
25 655167175446
26 2306629089486
27 8261570136834
28 29484704469390