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 | 81 |
| 3 | 121 |
| 4 | 361 |
| 5 | 1352569 |
| 6 | 2140369 |
| 7 | 6416089 |
| 8 | 9186961 |
| 9 | 30261001 |
| 10 | 108056025 |
| 11 | 820765201 |
| 12 | 2331248089 |
| 13 | 170938421809 |
| 14 | 8189950752481 |
| 15 | 8870860603201 |
| 16 | 33527956250889 |
| 17 | 136943052939289 |
| 18 | 149526943190641 |
| 19 | 4953581020385761 |
| 20 | 509672946670475329 |
| 21 | 578899033007097609 |
| 22 | 2043000477545048329 |