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 | 23 |
| 2 | 57 |
| 3 | 127131 |
| 4 | 937941 |
| 5 | 2087320879 |
| 6 | 6557965581 |
| 7 | 925039925051 |
| 8 | 14073611407383 |
| 9 | 89811798981191 |
| 10 | 94647139464723 |
| 11 | 1553629915536303 |
| 12 | 122504623122504633 |
| 13 | 200602291200602313 |
| 14 | 495401873495401911 |
| 15 | 133201458751133201458773 |