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 | 4 |
| 2 | 9 |
| 3 | 16 |
| 4 | 25 |
| 5 | 64 |
| 6 | 289 |
| 7 | 2401 |
| 8 | 7921 |
| 9 | 3418801 |
| 10 | 19439281 |
| 11 | 24730729 |
| 12 | 40819321 |
| 13 | 52258441 |
| 14 | 67848169 |
| 15 | 75151561 |
| 16 | 76405081 |
| 17 | 142396489 |
| 18 | 175006441 |
| 19 | 185313769 |
| 20 | 198443569 |
| 21 | 253541929 |
| 22 | 352425529 |
| 23 | 369062521 |
| 24 | 386554921 |
| 25 | 414896161 |
| 26 | 499477801 |
| 27 | 526105969 |
| 28 | 684921241 |
| 29 | 775678201 |