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 | 13 |
| 2 | 65 |
| 3 | 34 |
| 4 | 109 |
| 5 | 296 |
| 6 | 635 |
| 7 | 1563 |
| 8 | 3948 |
| 9 | 9405 |
| 10 | 22602 |
| 11 | 55730 |
| 12 | 135448 |
| 13 | 327429 |
| 14 | 798275 |
| 15 | 1944498 |
| 16 | 4720205 |
| 17 | 11478126 |
| 18 | 27935558 |
| 19 | 67913732 |
| 20 | 165112453 |
| 21 | 401615997 |
| 22 | 976675958 |
| 23 | 2374829337 |
| 24 | 5775344378 |
| 25 | 14045080684 |
| 26 | 34154018024 |
| 27 | 83055854601 |