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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4181 |
| 5 | 5 |
| 6 | 610 |
| 7 | 75025 |
| 8 | 8 |
| 9 | 987 |
| 10 | 10946 |
| 11 | 1134903170 |
| 12 | 121393 |
| 13 | 13 |
| 14 | 144 |
| 15 | 1597 |
| 16 | 165580141 |
| 17 | 17711 |
| 18 | 1836311903 |
| 19 | 196418 |
| 20 | 20365011074 |
| 21 | 21 |
| 22 | 225851433717 |
| 23 | 233 |
| 24 | 24157817 |
| 25 | 2584 |
| 26 | 267914296 |
| 27 | 27777890035288 |
| 28 | 28657 |
| 29 | 2971215073 |
| 30 | 308061521170129 |
| 31 | 317811 |