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 | 121 |
| 3 | 841 |
| 4 | 6889 |
| 5 | 60025 |
| 6 | 62001 |
| 7 | 68644 |
| 8 | 534361 |
| 9 | 540225 |
| 10 | 1042441 |
| 11 | 4791721 |
| 12 | 4809249 |
| 13 | 20811844 |
| 14 | 43072969 |
| 15 | 43125489 |
| 16 | 43283241 |
| 17 | 387499225 |
| 18 | 387656721 |
| 19 | 388129401 |
| 20 | 567725929 |
| 21 | 713584369 |
| 22 | 1255284900 |
| 23 | 2231617600 |
| 24 | 3487020601 |
| 25 | 3487493025 |
| 26 | 3488910489 |
| 27 | 31381768201 |