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 | 8 |
| 3 | 21 |
| 4 | 133 |
| 5 | 278 |
| 6 | 507 |
| 7 | 4442 |
| 8 | 5383 |
| 9 | 22457 |
| 10 | 35628 |
| 11 | 177291 |
| 12 | 194162 |
| 13 | 642257 |
| 14 | 1062108 |
| 15 | 3351690 |