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 | 8 |
| 3 | 54 |
| 4 | 333 |
| 5 | 1896 |
| 6 | 9874 |
| 7 | 47164 |
| 8 | 207112 |
| 9 | 840323 |
| 10 | 3168506 |
| 11 | 11170331 |
| 12 | 37034409 |
| 13 | 116095018 |
| 14 | 345785753 |
| 15 | 982835676 |
| 16 | 2676217504 |
| 17 | 7005306389 |
| 18 | 17681946594 |
| 19 | 43153532167 |
| 20 | 102080966243 |
| 21 | 234565062960 |
| 22 | 524594120393 |
| 23 | 1143910860870 |