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 | 11 |
| 2 | 66 |
| 3 | 286 |
| 4 | 1001 |
| 5 | 3003 |
| 6 | 8008 |
| 7 | 19448 |
| 8 | 43758 |
| 9 | 92378 |
| 10 | 184756 |
| 11 | 352715 |
| 12 | 646635 |
| 13 | 1144000 |
| 14 | 1960970 |
| 15 | 3267759 |
| 16 | 5308732 |
| 17 | 8428277 |
| 18 | 13103662 |
| 19 | 19986252 |
| 20 | 29952637 |
| 21 | 44167409 |
| 22 | 64159524 |
| 23 | 91914394 |
| 24 | 129984074 |
| 25 | 181618140 |
| 26 | 250918096 |
| 27 | 343018401 |
| 28 | 464297471 |
| 29 | 622622286 |