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 | 1 |
| 2 | 0 |
| 3 | -4 |
| 4 | -10 |
| 5 | -12 |
| 6 | 4 |
| 7 | 52 |
| 8 | 120 |
| 9 | 128 |
| 10 | -88 |
| 11 | -672 |
| 12 | -1424 |
| 13 | -1328 |
| 14 | 1536 |
| 15 | 8576 |
| 16 | 16736 |
| 17 | 13248 |
| 18 | -24128 |
| 19 | -108224 |
| 20 | -194688 |
| 21 | -124672 |
| 22 | 356480 |
| 23 | 1351680 |
| 24 | 2239744 |
| 25 | 1063168 |
| 26 | -5056512 |
| 27 | -16718848 |
| 28 | -25451008 |
| 29 | -7351296 |
| 30 | 69637120 |
| 31 | 204878848 |
| 32 | 285186048 |
| 33 | 21340160 |
| 34 | -937449472 |
| 35 | -2487951360 |
| 36 | -3143684096 |