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 | 10 |
| 2 | 154 |
| 3 | 2458 |
| 4 | 39322 |
| 5 | 629146 |
| 6 | 10066330 |
| 7 | 161061274 |
| 8 | 2576980378 |
| 9 | 41231686042 |
| 10 | 659706976666 |
| 11 | 10555311626650 |
| 12 | 168884986026394 |
| 13 | 2702159776422298 |
| 14 | 43234556422756762 |
| 15 | 691752902764108186 |
| 16 | 11068046444225730970 |
| 17 | 177088743107611695514 |
| 18 | 2833419889721787128218 |
| 19 | 45334718235548594051482 |