# A000647 (b-file synthesized from sequence entry)
0 1
1 2
2 12
3 32
4 110
5 310
6 920
7 2558
8 7177
9 19660
10 53864
11 146180
12 396296
13 1070296
14 2888662
15 7785856
16 20982905
17 56536762
18 152378548
19 410825678
20 1108224556
21 2991244712
22 8079252116
23 21837144430
24 59066580606
25 159886668880
26 433122375508