# A072863 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 26
4 72
5 192
6 496
7 1248
8 3072
9 7424
10 17664
11 41472
12 96256
13 221184
14 503808
15 1138688
16 2555904
17 5701632
18 12648448
19 27918336
20 61341696
21 134217728
22 292552704
23 635437056
24 1375731712
25 2969567232
26 6392119296
27 13723762688