# A027142 (b-file synthesized from sequence entry)
2 12
3 105
4 831
5 6648
6 53545
7 434458
8 3548871
9 29166324
10 241006333
11 2001145585
12 16688238416
13 139711675493
14 1173762075101
15 9892582661593
16 83617537623039
17 708654873428000
18 6020421349942965
19 51261344063828713
20 437370998284452284
21 3738875265960650016