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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 11 |
| 13 | 66 |
| 14 | 286 |
| 15 | 1001 |
| 16 | 3003 |
| 17 | 8008 |
| 18 | 19448 |
| 19 | 43758 |
| 20 | 92378 |
| 21 | 184756 |
| 22 | 3711916 |
| 23 | 39277446 |
| 24 | 290971966 |
| 25 | 1693270006 |
| 26 | 8237327526 |
| 27 | 34822561201 |
| 28 | 131333661601 |
| 29 | 450356465701 |
| 30 | 1424215551901 |
| 31 | 4199713947571 |
| 32 | 122741742741301 |
| 33 | 1863639732429616 |