# A179264 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 13
5 41
6 151
7 672
8 3047
9 13796
10 70702
11 406241
12 2306597
13 13050503
14 81009240
15 546463298
16 3646507024
17 24169492053
18 172363021094
19 1313445510576
20 9904229155933
21 74120163086669