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 | 1 |
| 2 | 9 |
| 3 | 121 |
| 4 | 2169 |
| 5 | 48601 |
| 6 | 1306809 |
| 7 | 40994521 |
| 8 | 1469709369 |
| 9 | 59277466201 |
| 10 | 2656472295609 |
| 11 | 130952452264921 |
| 12 | 7042235448544569 |
| 13 | 410269802967187801 |
| 14 | 25740278881968596409 |
| 15 | 1730295054262416751321 |
| 16 | 124066865052334175027769 |