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 | 0 |
| 2 | 3 |
| 3 | 1 |
| 4 | 10 |
| 5 | 6 |
| 6 | 36 |
| 7 | 28 |
| 8 | 135 |
| 9 | 121 |
| 10 | 517 |
| 11 | 507 |
| 12 | 2003 |
| 13 | 2093 |
| 14 | 7815 |
| 15 | 8569 |
| 16 | 30634 |
| 17 | 34902 |
| 18 | 120480 |
| 19 | 141664 |
| 20 | 475002 |
| 21 | 573574 |
| 22 | 1876294 |
| 23 | 2318010 |
| 24 | 7422676 |
| 25 | 9354540 |
| 26 | 29400192 |
| 27 | 37708672 |
| 28 | 116567356 |
| 29 | 151868100 |
| 30 | 462561572 |
| 31 | 611180252 |
| 32 | 1836843591 |
| 33 | 2458123705 |