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 | 0 |
| 1 | 15 |
| 2 | 38 |
| 3 | 58 |
| 4 | 89 |
| 5 | 582 |
| 6 | 1964 |
| 7 | 19526 |
| 8 | 596667 |
| 9 | 30104309 |
| 10 | 140410607143 |
| 11 | 3753516452901780134 |