# A137574 (b-file synthesized from sequence entry)
1 2
2 3
3 5
4 8
5 13
6 21
7 89
8 233
9 1597
10 17711
11 28657
12 46368
13 75025
14 121393
15 514229
16 1346269
17 165580141
18 433494437
19 2971215073
20 53316291173