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 | 0 |
| 2 | 25 |
| 3 | 289 |
| 4 | 2025 |
| 5 | 13225 |
| 6 | 100489 |
| 7 | 198025 |
| 8 | 319225 |
| 9 | 466489 |
| 10 | 4862025 |
| 11 | 19758025 |
| 12 | 42471289 |
| 13 | 1975358025 |
| 14 | 3199599225 |
| 15 | 60415182025 |
| 16 | 134885049289 |
| 17 | 151192657225 |
| 18 | 197531358025 |
| 19 | 207612366025 |
| 20 | 248956092025 |
| 21 | 447136954489 |
| 22 | 588186226489 |
| 23 | 19753091358025 |
| 24 | 31996727599225 |
| 25 | 311995522926025 |
| 26 | 1975308691358025 |