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 | 2693 |
| 2 | 123653 |
| 3 | 1812389 |
| 4 | 2349407 |
| 5 | 12686723 |
| 6 | 201183431 |
| 7 | 332997529 |
| 8 | 3822485189 |
| 9 | 6326953051 |
| 10 | 54520709801 |
| 11 | 224107337017 |
| 12 | 272603549005 |
| 13 | 541786979683 |
| 14 | 1035893486219 |
| 15 | 1568751359119 |
| 16 | 4258039403323 |
| 17 | 5179467431095 |
| 18 | 10293952613977 |
| 19 | 29806275823261 |