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 | 3 |
| 4 | 6 |
| 5 | 26 |
| 6 | 190 |
| 7 | 610 |
| 8 | 2078 |
| 9 | 2670 |
| 10 | 7038 |
| 11 | 16466 |
| 12 | 89973 |
| 13 | 150374 |
| 14 | 157298 |
| 15 | 163367 |
| 16 | 419090 |
| 17 | 640627 |
| 18 | 879702 |
| 19 | 3479689 |
| 20 | 5618437 |
| 21 | 11304721 |
| 22 | 74106171 |
| 23 | 471591726 |
| 24 | 475915439 |
| 25 | 1198344149 |
| 26 | 2270643086 |
| 27 | 3051266010 |