This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 17 |
| 5 | 23 |
| 6 | 89 |
| 7 | 257 |
| 8 | 353 |
| 9 | 1409 |
| 10 | 2663 |
| 11 | 30977 |
| 12 | 65537 |
| 13 | 170369 |
| 14 | 495617 |
| 15 | 5767169 |
| 16 | 23068673 |
| 17 | 59969537 |
| 18 | 82458113 |
| 19 | 453519617 |
| 20 | 3429742097 |
| 21 | 4715895383 |
| 22 | 15352201217 |
| 23 | 39909726209 |
| 24 | 1857616347137 |
| 25 | 45732811767809 |
| 26 | 96757023244289 |