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 | 1225 |
| 2 | 27225 |
| 3 | 207025 |
| 4 | 938961 |
| 5 | 3136441 |
| 6 | 8555625 |
| 7 | 20205025 |
| 8 | 42837025 |
| 9 | 83521321 |
| 10 | 152300281 |
| 11 | 262926225 |
| 12 | 433680625 |
| 13 | 688275225 |
| 14 | 1056835081 |
| 15 | 1576963521 |
| 16 | 2294889025 |
| 17 | 3266694025 |
| 18 | 4559625625 |
| 19 | 6253488241 |
| 20 | 8442118161 |
| 21 | 11234940025 |
| 22 | 14758605225 |
| 23 | 19158712225 |
| 24 | 24601608801 |