# A046865 (b-file synthesized from sequence entry)
1 0
2 1
3 3
4 9
5 13
6 15
7 25
8 39
9 69
10 165
11 171
12 209
13 339
14 2033
15 6583
16 15393
17 282989
18 498483
19 504221
20 754611
21 864751