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) |
|---|---|
| 0 | 1 |
| 1 | 49 |
| 2 | 9025 |
| 3 | 25921 |
| 4 | 275625 |
| 5 | 511225 |
| 6 | 2393209 |
| 7 | 3705625 |
| 8 | 11675889 |
| 9 | 16378209 |
| 10 | 40844881 |
| 11 | 53831569 |
| 12 | 115025625 |
| 13 | 145226601 |
| 14 | 278055625 |
| 15 | 340218025 |
| 16 | 600103009 |
| 17 | 716900625 |
| 18 | 1186595809 |
| 19 | 1391066209 |
| 20 | 2188461961 |
| 21 | 2526771289 |
| 22 | 3813680025 |