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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 135 |
| 6 | 283 |
| 7 | 418 |
| 8 | 701 |
| 9 | 1820 |
| 10 | 18901 |
| 11 | 39622 |
| 12 | 58523 |
| 13 | 98145 |
| 14 | 254813 |
| 15 | 2646275 |
| 16 | 5547363 |
| 17 | 8193638 |
| 18 | 13741001 |
| 19 | 35675640 |
| 20 | 370497401 |
| 21 | 776670442 |
| 22 | 1147167843 |
| 23 | 1923838285 |
| 24 | 4994844413 |
| 25 | 51872282415 |