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 | 1 |
| 3 | 25 |
| 4 | 169 |
| 5 | 841 |
| 6 | 289 |
| 7 | 7921 |
| 8 | 28561 |
| 9 | 9409 |
| 10 | 54289 |
| 11 | 187489 |
| 12 | 93025 |
| 13 | 970225 |
| 14 | 1755625 |
| 15 | 2550409 |
| 16 | 8392609 |
| 17 | 17480761 |
| 18 | 32959081 |
| 19 | 10452289 |
| 20 | 57168721 |
| 21 | 82391929 |
| 22 | 29953729 |
| 23 | 216119401 |
| 24 | 821223649 |
| 25 | 1119638521 |
| 26 | 354681889 |
| 27 | 1871514121 |
| 28 | 2666792881 |
| 29 | 967521025 |
| 30 | 5628750625 |
| 31 | 9323254249 |