# A155392 (b-file synthesized from sequence entry)
5 1
6 4
7 13
8 28
9 49
10 96
11 501
12 3463
13 18127
14 74376
15 331418
16 2409920
17 26775212
18 305337017
19 3047283148
20 31207251008
21 409221933719