# A143805 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 7
4 36
5 250
6 2229
7 24656
8 329883
9 5233837
10 96907908
11 2066551242
12 50196458429
13 1375782397859
14 42203985613593
15 1438854199059479
16 54180508061067099
17 2241000820010271224
18 101316373253530824771
19 4984697039955303538934
20 265819807417517749652933