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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 16 |
| 5 | 62 |
| 6 | 186 |
| 7 | 456 |
| 8 | 962 |
| 9 | 1818 |
| 10 | 3162 |
| 11 | 5156 |
| 12 | 7986 |
| 13 | 11862 |
| 14 | 17018 |
| 15 | 23712 |
| 16 | 32226 |
| 17 | 42866 |
| 18 | 55962 |
| 19 | 71868 |
| 20 | 90962 |
| 21 | 113646 |
| 22 | 140346 |
| 23 | 171512 |
| 24 | 207618 |
| 25 | 249162 |
| 26 | 296666 |
| 27 | 350676 |
| 28 | 411762 |
| 29 | 480518 |
| 30 | 557562 |
| 31 | 643536 |
| 32 | 739106 |
| 33 | 844962 |
| 34 | 961818 |