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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 28 |
| 6 | 128 |
| 7 | 539 |
| 8 | 2651 |
| 9 | 13000 |
| 10 | 67466 |
| 11 | 355381 |
| 12 | 1926343 |
| 13 | 10590537 |
| 14 | 59234734 |
| 15 | 335302599 |