# A019237 (b-file synthesized from sequence entry)
3 0
4 1
5 4
6 1
7 12
8 32
9 52
10 100
11 242
12 622
13 1318
14 3188
15 8382
16 19662
17 49006
18 130188
19 331642
20 850856
21 2239524
22 5850712
23 15287652
24 40300278
25 106291956
26 280451616
27 742278248
28 1968624658
29 5228549484
30 13912280278
31 37089229168