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 | 3 |
| 2 | 19 |
| 3 | 39 |
| 4 | 180 |
| 5 | 316 |
| 6 | 971 |
| 7 | 6836 |
| 8 | 25263 |
| 9 | 103825 |
| 10 | 279274 |
| 11 | 279268 |
| 12 | 1727604 |
| 13 | 18053496 |
| 14 | 8760852 |
| 15 | 106892453 |