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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 27 |
| 6 | 94 |
| 7 | 393 |
| 8 | 2119 |
| 9 | 14524 |
| 10 | 126758 |
| 11 | 1392387 |
| 12 | 19109099 |
| 13 | 326005775 |
| 14 | 6905776799 |
| 15 | 181945055235 |