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 | 5 |
| 2 | 15 |
| 3 | 40 |
| 4 | 114 |
| 5 | 371 |
| 6 | 1422 |
| 7 | 6334 |
| 8 | 32238 |
| 9 | 184655 |
| 10 | 1175454 |
| 11 | 8231308 |
| 12 | 62882262 |
| 13 | 520416569 |
| 14 | 4638303786 |
| 15 | 44292536061 |
| 16 | 451160065069 |
| 17 | 4882696090609 |
| 18 | 55951575728713 |
| 19 | 676777708544967 |
| 20 | 8617001415386120 |
| 21 | 115200823068725262 |
| 22 | 1613460678695102980 |
| 23 | 23624702309844184487 |