# A037100 (b-file synthesized from sequence entry)
1 4
2 6
3 12
4 24
5 54
6 186
7 3246
8 25926
9 169314
10 412026
11 541524
12 37949286
13 124716066
14 324532464
15 26678398374
16 3559613215806
17 30751771983294
18 20116294396883346