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 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 17 |
| 6 | 31 |
| 7 | 97 |
| 8 | 211 |
| 9 | 769 |
| 10 | 7681 |
| 11 | 270271 |
| 12 | 68918851 |
| 13 | 371589121 |
| 14 | 3923981107201 |
| 15 | 2856658246041601 |
| 16 | 85699747381248001 |
| 17 | 639661973545755541631251 |
| 18 | 5960455827486621749452458387843751 |