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 | 2 |
| 1 | -90 |
| 2 | -166 |
| 3 | -2166 |
| 4 | -12010 |
| 5 | -89598 |
| 6 | -594910 |
| 7 | -4127706 |
| 8 | -28160326 |
| 9 | -193357590 |
| 10 | -1324392298 |
| 11 | -9079876830 |
| 12 | -62228230846 |
| 13 | -426534794586 |
| 14 | -2923470679270 |
| 15 | -20037876860598 |
| 16 | -137341361295850 |
| 17 | -941352453457086 |
| 18 | -6452123715212446 |
| 19 | -44223519044857050 |