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 | 25 |
| 2 | 2491 |
| 3 | 249919 |
| 4 | 24993439 |
| 5 | 2499984871 |
| 6 | 249999996751 |
| 7 | 24999999992431 |
| 8 | 2499999999940951 |
| 9 | 249999999999995239 |
| 10 | 24999999999999996031 |
| 11 | 2499999999999999964279 |
| 12 | 249999999999999999946639 |
| 13 | 24999999999999999997538239 |
| 14 | 2499999999999999999999854839 |
| 15 | 249999999999999999999999946639 |