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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | -4 |
| 4 | 11 |
| 5 | -20 |
| 6 | 32 |
| 7 | -56 |
| 8 | 95 |
| 9 | -124 |
| 10 | 146 |
| 11 | -220 |
| 12 | 328 |
| 13 | -364 |
| 14 | 400 |
| 15 | -584 |
| 16 | 775 |
| 17 | -816 |
| 18 | 881 |
| 19 | -1140 |
| 20 | 1486 |
| 21 | -1600 |
| 22 | 1552 |
| 23 | -2024 |
| 24 | 2712 |
| 25 | -2620 |
| 26 | 2562 |
| 27 | -3400 |
| 28 | 4064 |
| 29 | -4060 |
| 30 | 4112 |
| 31 | -4960 |
| 32 | 6231 |
| 33 | -6208 |
| 34 | 5730 |
| 35 | -7216 |
| 36 | 8947 |
| 37 | -8436 |
| 38 | 8000 |
| 39 | -10248 |
| 40 | 12230 |
| 41 | -11480 |
| 42 | 11232 |
| 43 | -13244 |
| 44 | 15752 |