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 | -12 |
| 2 | 54 |
| 3 | -88 |
| 4 | -99 |
| 5 | 540 |
| 6 | -418 |
| 7 | -648 |
| 8 | 594 |
| 9 | 836 |
| 10 | 1056 |
| 11 | -4104 |
| 12 | -209 |
| 13 | 4104 |
| 14 | -594 |
| 15 | 4256 |
| 16 | -6480 |
| 17 | -4752 |
| 18 | -298 |
| 19 | 5016 |
| 20 | 17226 |
| 21 | -12100 |
| 22 | -5346 |
| 23 | -1296 |
| 24 | -9063 |
| 25 | -7128 |
| 26 | 19494 |
| 27 | 29160 |
| 28 | -10032 |
| 29 | -7668 |
| 30 | -34738 |
| 31 | 8712 |
| 32 | -22572 |
| 33 | 21812 |
| 34 | 49248 |
| 35 | -46872 |
| 36 | 67562 |
| 37 | 2508 |
| 38 | -47520 |
| 39 | -76912 |
| 40 | -25191 |
| 41 | 67716 |