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 | 0 |
| 1 | -1 |
| 2 | 8 |
| 3 | -22 |
| 4 | 48 |
| 5 | -87 |
| 6 | 144 |
| 7 | -220 |
| 8 | 320 |
| 9 | -445 |
| 10 | 600 |
| 11 | -786 |
| 12 | 1008 |
| 13 | -1267 |
| 14 | 1568 |
| 15 | -1912 |
| 16 | 2304 |
| 17 | -2745 |
| 18 | 3240 |
| 19 | -3790 |
| 20 | 4400 |
| 21 | -5071 |
| 22 | 5808 |
| 23 | -6612 |
| 24 | 7488 |
| 25 | -8437 |
| 26 | 9464 |
| 27 | -10570 |
| 28 | 11760 |
| 29 | -13035 |
| 30 | 14400 |
| 31 | -15856 |
| 32 | 17408 |
| 33 | -19057 |
| 34 | 20808 |
| 35 | -22662 |
| 36 | 24624 |
| 37 | -26695 |
| 38 | 28880 |
| 39 | -31180 |
| 40 | 33600 |