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 | 14 |
| 3 | 459 |
| 4 | 35312 |
| 5 | 4072108 |
| 6 | 638653285 |
| 7 | 128441726634 |
| 8 | 31872148398195 |
| 9 | 9490641145219266 |
| 10 | 3321018871480028710 |