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 | -3 |
| 2 | 6 |
| 3 | -10 |
| 4 | 15 |
| 5 | -21 |
| 6 | 28 |
| 7 | -36 |
| 8 | 42 |
| 9 | -43 |
| 10 | 36 |
| 11 | -18 |
| 12 | -14 |
| 13 | 63 |
| 14 | -132 |
| 15 | 224 |
| 16 | -336 |
| 17 | 459 |
| 18 | -578 |
| 19 | 672 |
| 20 | -714 |
| 21 | 671 |
| 22 | -504 |
| 23 | 168 |
| 24 | 378 |
| 25 | -1161 |
| 26 | 2184 |
| 27 | -3419 |
| 28 | 4794 |
| 29 | -6183 |
| 30 | 7396 |
| 31 | -8169 |
| 32 | 8169 |
| 33 | -7014 |
| 34 | 4308 |
| 35 | 321 |
| 36 | -7156 |
| 37 | 16311 |
| 38 | -27636 |
| 39 | 40607 |
| 40 | -54222 |
| 41 | 66924 |
| 42 | -76572 |
| 43 | 80451 |
| 44 | -75372 |
| 45 | 57883 |