# A013032 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 32
5 122
6 544
7 2874
8 17536
9 124274
10 997504
11 9112074
12 91956224
13 1034453162
14 12588279552
15 168010601274
16 2388796493824
17 36823967146978
18 598131709419520
19 10446218843141514
20 190679121272193024