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 | 8 |
| 3 | 9 |
| 4 | 152 |
| 5 | 161 |
| 6 | 1279 |
| 7 | 1440 |
| 8 | 24319 |
| 9 | 25759 |
| 10 | 204632 |
| 11 | 230391 |
| 12 | 3890888 |
| 13 | 4121279 |
| 14 | 32739841 |
| 15 | 36861120 |
| 16 | 622517761 |
| 17 | 659378881 |
| 18 | 5238169928 |
| 19 | 5897548809 |
| 20 | 99598950872 |
| 21 | 105496499681 |
| 22 | 838074448639 |
| 23 | 943570948320 |
| 24 | 15935209621759 |
| 25 | 16878780570079 |