# A012936 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 9
4 24
5 89
6 438
7 2527
8 16072
9 111257
10 851866
11 7138923
12 65286276
13 641779181
14 6769229670
15 76040241775
16 908362886512
17 11481062493713
18 153172480730482
19 2149793170916115
20 31664861861245692