# A146597 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 3
6 7
7 19
8 51
9 237
10 1335
11 8829
12 68891
13 649429
14 7839465
15 116522409
16 2129542541
17 47609599737
18 1308687213295
19 44429361526611
20 1853713445956347