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) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 67 |
| 3 | 383 |
| 4 | 1669 |
| 5 | 6275 |
| 6 | 23431 |
| 7 | 94967 |
| 8 | 423433 |
| 9 | 2012219 |
| 10 | 9865675 |
| 11 | 48989231 |
| 12 | 244389517 |
| 13 | 1221074483 |
| 14 | 6104053519 |
| 15 | 30518337575 |
| 16 | 152588939281 |
| 17 | 762940873067 |
| 18 | 3814699155283 |
| 19 | 19073488804319 |
| 20 | 95367434840725 |
| 21 | 476837162287331 |
| 22 | 2384185796169367 |
| 23 | 11920928961514583 |