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 | 12 |
| 4 | 15 |
| 5 | 51 |
| 6 | 194 |
| 7 | 498 |
| 8 | 2136 |
| 9 | 2822 |
| 10 | 3762 |
| 11 | 7428 |
| 12 | 22740 |
| 13 | 30452 |
| 14 | 37952 |
| 15 | 55254 |