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 | 5 |
| 2 | 28 |
| 3 | 179 |
| 4 | 1291 |
| 5 | 10358 |
| 6 | 91337 |
| 7 | 876289 |
| 8 | 9070546 |
| 9 | 100596161 |
| 10 | 1188403063 |
| 11 | 14881408616 |
| 12 | 196696197075 |
| 13 | 2734274453061 |
| 14 | 39848045797116 |
| 15 | 607129121193015 |
| 16 | 9646995492421711 |
| 17 | 159508268424031670 |
| 18 | 2739019526280054917 |