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 | 4 |
| 3 | -4 |
| 4 | 3 |
| 5 | -1 |
| 6 | -2 |
| 7 | 6 |
| 8 | -11 |
| 9 | 17 |
| 10 | -24 |
| 11 | 32 |
| 12 | -41 |
| 13 | 51 |
| 14 | -62 |
| 15 | 74 |
| 16 | -87 |
| 17 | 101 |
| 18 | -116 |
| 19 | 132 |
| 20 | -149 |
| 21 | 167 |
| 22 | -186 |
| 23 | 206 |
| 24 | -227 |
| 25 | 249 |
| 26 | -272 |
| 27 | 296 |
| 28 | -321 |
| 29 | 347 |
| 30 | -374 |
| 31 | 402 |
| 32 | -431 |
| 33 | 461 |
| 34 | -492 |
| 35 | 524 |
| 36 | -557 |
| 37 | 591 |
| 38 | -626 |
| 39 | 662 |
| 40 | -699 |
| 41 | 737 |
| 42 | -776 |
| 43 | 816 |
| 44 | -857 |
| 45 | 899 |
| 46 | -942 |
| 47 | 986 |