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 | -18 |
| 2 | -594 |
| 3 | -4878 |
| 4 | -19026 |
| 5 | -56268 |
| 6 | -160974 |
| 7 | -302544 |
| 8 | -608850 |
| 9 | -1185858 |
| 10 | -1856844 |
| 11 | -2898936 |
| 12 | -5156046 |
| 13 | -6683292 |
| 14 | -9983952 |
| 15 | -15248628 |
| 16 | -19483218 |
| 17 | -25557444 |
| 18 | -39133314 |
| 19 | -44569800 |
| 20 | -59475276 |
| 21 | -81989424 |
| 22 | -95664888 |
| 23 | -115854192 |
| 24 | -164998350 |
| 25 | -175837518 |
| 26 | -220548636 |
| 27 | -288163998 |
| 28 | -319789008 |
| 29 | -369200700 |