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 | 184755 |
| 11 | 352705 |
| 12 | 646580 |
| 13 | 1143780 |
| 14 | 1960255 |
| 15 | 3265757 |
| 16 | 5303727 |
| 17 | 8416837 |
| 18 | 13079352 |
| 19 | 19937632 |
| 20 | 29860259 |
| 21 | 43999449 |
| 22 | 63865594 |
| 23 | 91416974 |