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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 3 |
| 7 | 7 |
| 8 | 44 |
| 9 | 90 |
| 10 | 375 |
| 11 | 715 |
| 12 | 2487 |
| 13 | 4550 |
| 14 | 14350 |
| 15 | 25515 |
| 16 | 75724 |
| 17 | 132090 |
| 18 | 376779 |
| 19 | 647995 |
| 20 | 1798175 |
| 21 | 3060736 |
| 22 | 8329046 |
| 23 | 14064523 |
| 24 | 37725791 |
| 25 | 63313250 |
| 26 | 168011025 |
| 27 | 280576935 |
| 28 | 738453366 |
| 29 | 1228322550 |
| 30 | 3212296488 |
| 31 | 5325765931 |
| 32 | 13858103244 |
| 33 | 22913129140 |
| 34 | 59383320585 |