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 | 225 |
| 3 | 2025 |
| 4 | 8281 |
| 5 | 23409 |
| 6 | 53361 |
| 7 | 105625 |
| 8 | 189225 |
| 9 | 314721 |
| 10 | 494209 |
| 11 | 741321 |
| 12 | 1071225 |
| 13 | 1500625 |
| 14 | 2047761 |
| 15 | 2732409 |
| 16 | 3575881 |
| 17 | 4601025 |
| 18 | 5832225 |
| 19 | 7295401 |
| 20 | 9018009 |
| 21 | 11029041 |
| 22 | 13359025 |
| 23 | 16040025 |
| 24 | 19105641 |
| 25 | 22591009 |
| 26 | 26532801 |
| 27 | 30969225 |
| 28 | 35940025 |
| 29 | 41486481 |
| 30 | 47651409 |