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 | 33 |
| 2 | 225 |
| 3 | 833 |
| 4 | 2241 |
| 5 | 4961 |
| 6 | 9633 |
| 7 | 17025 |
| 8 | 28033 |
| 9 | 43681 |
| 10 | 65121 |
| 11 | 93633 |
| 12 | 130625 |
| 13 | 177633 |
| 14 | 236321 |
| 15 | 308481 |
| 16 | 396033 |
| 17 | 501025 |
| 18 | 625633 |
| 19 | 772161 |
| 20 | 943041 |
| 21 | 1140833 |
| 22 | 1368225 |
| 23 | 1628033 |
| 24 | 1923201 |