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 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 2 |
| 5 | 8 |
| 6 | 3 |
| 7 | 7 |
| 8 | 5 |
| 9 | 11 |
| 10 | 31 |
| 11 | 9 |
| 12 | 127 |
| 13 | 17 |
| 14 | 709 |
| 15 | 5381 |
| 16 | 52711 |
| 17 | 13 |
| 18 | 648391 |
| 19 | 59 |
| 20 | 9737333 |
| 21 | 174440041 |
| 22 | 3657500101 |
| 23 | 277 |
| 24 | 88362852307 |
| 25 | 2428095424619 |
| 26 | 75063692618249 |
| 27 | 2586559730396077 |