# A147237 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 19
9 37
10 71
11 177
12 551
13 1807
14 6509
15 26627
16 139987
17 688205
18 4186827
19 24218141
20 169157335
21 1233973193