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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 24 |
| 5 | 73 |
| 6 | 227 |
| 7 | 734 |
| 8 | 2430 |
| 9 | 8150 |
| 10 | 27718 |
| 11 | 95514 |
| 12 | 332578 |
| 13 | 1168261 |
| 14 | 4136477 |
| 15 | 14749992 |
| 16 | 52925886 |
| 17 | 190973410 |
| 18 | 692583902 |
| 19 | 2523265494 |
| 20 | 9231352260 |
| 21 | 33901898722 |
| 22 | 124940568222 |
| 23 | 461938289518 |
| 24 | 1713007181342 |
| 25 | 6369928427268 |
| 26 | 23747917426918 |