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 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 23 |
| 5 | 53 |
| 6 | 307 |
| 7 | 769 |
| 8 | 5039 |
| 9 | 13049 |
| 10 | 603667 |
| 11 | 1578823 |
| 12 | 10810469 |
| 13 | 427860443429 |
| 14 | 16944504081930151 |
| 15 | 31525215457325198354227 |