# A019197 (b-file synthesized from sequence entry)
3 0
4 0
5 4
6 8
7 8
8 20
9 66
10 126
11 284
12 698
13 1700
14 3764
15 9788
16 24063
17 58510
18 145944
19 376158
20 953213
21 2446110
22 6344582
23 16636124
24 43540862
25 115124512
26 305330903
27 813484632
28 2170046104
29 5813727346
30 15589605935
31 41895664900