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 | 25 |
| 5 | 65 |
| 6 | 226 |
| 7 | 755 |
| 8 | 2539 |
| 9 | 8794 |
| 10 | 30539 |
| 11 | 106401 |
| 12 | 371492 |
| 13 | 1298761 |
| 14 | 4544515 |
| 15 | 15909548 |
| 16 | 55710973 |
| 17 | 195119181 |
| 18 | 683443550 |
| 19 | 2394043807 |
| 20 | 8386437959 |
| 21 | 29378680446 |
| 22 | 102918338575 |
| 23 | 360542635085 |
| 24 | 1263055770396 |
| 25 | 4424759215289 |
| 26 | 15500920405007 |