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 | 25 |
| 3 | 453 |
| 4 | 677 |
| 5 | 839 |
| 6 | 1015 |
| 7 | 3735 |
| 8 | 4175 |
| 9 | 4413 |
| 10 | 10369 |
| 11 | 14239 |
| 12 | 43311 |
| 13 | 452567 |
| 14 | 1274185 |
| 15 | 14102849 |
| 16 | 37801813 |
| 17 | 71271705 |
| 18 | 93524231 |
| 19 | 386557609 |
| 20 | 2151748733 |
| 21 | 261349938459 |
| 22 | 761474469415 |
| 23 | 1284262332971 |
| 24 | 5115376212971 |
| 25 | 17863411895047 |
| 26 | 122189141425495 |