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 | -16 |
| 4 | 30 |
| 5 | -45 |
| 6 | 66 |
| 7 | -88 |
| 8 | 116 |
| 9 | -145 |
| 10 | 180 |
| 11 | -216 |
| 12 | 258 |
| 13 | -301 |
| 14 | 350 |
| 15 | -400 |
| 16 | 456 |
| 17 | -513 |
| 18 | 576 |
| 19 | -640 |
| 20 | 710 |
| 21 | -781 |
| 22 | 858 |
| 23 | -936 |
| 24 | 1020 |
| 25 | -1105 |
| 26 | 1196 |
| 27 | -1288 |
| 28 | 1386 |
| 29 | -1485 |
| 30 | 1590 |
| 31 | -1696 |
| 32 | 1808 |
| 33 | -1921 |
| 34 | 2040 |
| 35 | -2160 |
| 36 | 2286 |
| 37 | -2413 |
| 38 | 2546 |
| 39 | -2680 |
| 40 | 2820 |
| 41 | -2961 |
| 42 | 3108 |
| 43 | -3256 |
| 44 | 3410 |