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 | 2 |
| 1 | 5 |
| 2 | 31 |
| 3 | 283 |
| 4 | 23 |
| 5 | 743 |
| 6 | 331 |
| 7 | 1600069 |
| 8 | 410353 |
| 9 | 60042893 |
| 10 | 8969 |
| 11 | 7438489991 |
| 12 | 116803 |
| 13 | 4879633159 |
| 14 | 61215157711 |
| 15 | 338142271 |
| 16 | 34041259347101651 |
| 17 | 45072130459 |
| 18 | 6564253087266573169 |
| 19 | 22022174223585405703 |
| 20 | 121937899012999 |
| 21 | 69454092876521107983605569601 |
| 22 | 5311242856728321929909 |