# A147273 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 21
10 41
11 79
12 171
13 645
14 1743
15 5843
16 17953
17 98853
18 402491
19 2708743
20 12396159