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 | 21 |
| 2 | 462 |
| 3 | 1287 |
| 4 | 6188 |
| 5 | 11628 |
| 6 | 33649 |
| 7 | 118755 |
| 8 | 169911 |
| 9 | 435897 |
| 10 | 749398 |
| 11 | 962598 |
| 12 | 1533939 |
| 13 | 2869685 |
| 14 | 5006386 |
| 15 | 5949147 |
| 16 | 9657648 |
| 17 | 13019909 |
| 18 | 15020334 |
| 19 | 22537515 |
| 20 | 29034396 |
| 21 | 41507642 |
| 22 | 64446024 |
| 23 | 79208745 |
| 24 | 87541245 |
| 25 | 106308566 |
| 26 | 116828271 |
| 27 | 140364532 |
| 28 | 254231775 |