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 | 5 |
| 2 | 53 |
| 3 | 577 |
| 4 | 3359 |
| 5 | 64901 |
| 6 | 939923 |
| 7 | 2402431 |
| 8 | 72156649 |
| 9 | 215664901 |
| 10 | 7215664901 |
| 11 | 24310421593 |
| 12 | 721566490153 |
| 13 | 2359880576723 |
| 14 | 42159335939923 |
| 15 | 359399235988057 |
| 16 | 6749514631447249 |
| 17 | 98805767234884867 |
| 18 | 402431042159335939 |