# A056098 (b-file synthesized from sequence entry)
3 1
4 2
5 5
6 17
7 68
8 267
9 1230
10 5564
11 27575
12 136644
13 714772
14 3743265
15 20353789
16 110723361
17 619347223
18 3464770044
19 19801412122
20 113178582936