# A019131 (b-file synthesized from sequence entry)
3 0
4 0
5 6
6 5
7 4
8 30
9 54
10 94
11 276
12 596
13 1366
14 3584
15 8576
16 21201
17 54406
18 136804
19 348928
20 899188
21 2319122
22 6037956
23 15785710
24 41379139
25 109030504
26 288025149
27 762520406
28 2024506300
29 5385791938
30 14354896001
31 38336874146