# A006443 (b-file synthesized from sequence entry)
1 2
2 4
3 14
4 47
5 184
6 761
7 3314
8 14997
9 69886
10 333884
11 1626998
12 8067786
13 40580084
14 206734083
15 1064666724
16 5536480877
17 29036188788
18 153450351924
19 816503772830