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 | 5 |
| 3 | 55 |
| 4 | 629 |
| 5 | 3439 |
| 6 | 8525 |
| 7 | 17629 |
| 8 | 74455 |
| 9 | 120275 |
| 10 | 176305 |
| 11 | 244915 |
| 12 | 250325 |
| 13 | 628975 |
| 14 | 817819 |
| 15 | 839135 |
| 16 | 910675 |
| 17 | 912865 |
| 18 | 936955 |
| 19 | 1118435 |
| 20 | 1147925 |
| 21 | 2344127 |
| 22 | 4434125 |
| 23 | 7795715 |
| 24 | 7888477 |
| 25 | 9276275 |
| 26 | 10205525 |