# A334877 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 36
4 108
5 324
6 948
7 2740
8 7892
9 22540
10 64020
11 181396
12 511828
13 1440652
14 4045676
15 11322732
16 31615780
17 88100644
18 245143676
19 681002276
20 1888943100
21 5233741636
22 14484853148
23 40043579596
24 110590828396
25 305133547724