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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 6 |
| 5 | 8 |
| 6 | 10 |
| 7 | 17 |
| 8 | 26 |
| 9 | 42 |
| 10 | 88 |
| 11 | 265 |
| 12 | 1061 |
| 13 | 5386 |
| 14 | 37973 |
| 15 | 430226 |
| 16 | 9593162 |
| 17 | 537203722 |
| 18 | 87284918917 |
| 19 | 45090725208161 |
| 20 | 119461527204430998 |
| 21 | 2680661304042658594836 |
| 22 | 780156530872427084081683112 |
| 23 | 6906820989716086897909861601083690 |
[3,4,5,6,8,10,17,26,42,88,265,1061,5386,37973, 430226,9593162,537203722,87284918917, 45090725208161,119461527204430998, 2680661304042658594836, 780156530872427084081683112, 6906820989716086897909861601083690] |