# A019121 (b-file synthesized from sequence entry)
3 0
4 0
5 3
6 6
7 7
8 28
9 53
10 106
11 273
12 741
13 1593
14 3737
15 10000
16 24476
17 59099
18 153277
19 391122
20 989550
21 2562886
22 6673440
23 17343929
24 45400611
25 119484065
26 314948508
27 832164603
28 2205881171
29 5858756146
30 15584794178
31 41540936239