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 | 7 |
| 3 | 11 |
| 4 | 19 |
| 5 | 31 |
| 6 | 47 |
| 7 | 131 |
| 8 | 317 |
| 9 | 947 |
| 10 | 4327 |
| 11 | 48091 |
| 12 | 77237 |
| 13 | 158489 |
| 14 | 237733 |
| 15 | 1973087 |
| 16 | 3398221 |
| 17 | 4409519 |