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 | 564 |
| 1 | 780 |
| 2 | 1572 |
| 3 | 2124 |
| 4 | 3336 |
| 5 | 5064 |
| 6 | 7656 |
| 7 | 13944 |
| 8 | 26376 |
| 9 | 49464 |
| 10 | 88536 |
| 11 | 187944 |
| 12 | 295896 |
| 13 | 443904 |
| 14 | 812340 |
| 15 | 1652304 |
| 16 | 2767056 |
| 17 | 4803888 |
| 18 | 7914048 |
| 19 | 13495104 |
| 20 | 30725280 |
| 21 | 79741440 |
| 22 | 196505388 |
| 23 | 300216656 |
| 24 | 285162916 |
| 25 | 237325596 |
| 26 | 325831908 |
| 27 | 434442572 |
| 28 | 325831936 |
| 29 | 347001764 |
| 30 | 260735800 |
| 31 | 434766560 |