# A137653 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 5
5 6
6 20
7 21
8 22
9 28
10 58
11 120
12 144
13 1100
14 1926
15 2892
16 4773
17 5214
18 17241
19 18980
20 31265