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 | -1 |
| 2 | -2 |
| 3 | -2 |
| 4 | -1 |
| 5 | 0 |
| 6 | 2 |
| 7 | 4 |
| 8 | 6 |
| 9 | 7 |
| 10 | 8 |
| 11 | 8 |
| 12 | 6 |
| 13 | 4 |
| 14 | 0 |
| 15 | -6 |
| 16 | -11 |
| 17 | -18 |
| 18 | -26 |
| 19 | -32 |
| 20 | -38 |
| 21 | -44 |
| 22 | -46 |
| 23 | -46 |
| 24 | -44 |
| 25 | -37 |
| 26 | -26 |
| 27 | -12 |
| 28 | 8 |
| 29 | 32 |
| 30 | 58 |
| 31 | 90 |
| 32 | 124 |
| 33 | 158 |
| 34 | 194 |
| 35 | 228 |
| 36 | 259 |
| 37 | 286 |
| 38 | 306 |
| 39 | 316 |
| 40 | 316 |
| 41 | 304 |
| 42 | 276 |
| 43 | 232 |
| 44 | 170 |
| 45 | 88 |
| 46 | -12 |
| 47 | -132 |
| 48 | -272 |
| 49 | -431 |
| 50 | -606 |
| 51 | -794 |
| 52 | -994 |
| 53 | -1200 |
| 54 | -1408 |
| 55 | -1614 |
| 56 | -1808 |
| 57 | -1984 |
| 58 | -2138 |
| 59 | -2258 |
| 60 | -2336 |