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 | -4 |
| 2 | 4 |
| 3 | -4 |
| 4 | 20 |
| 5 | -24 |
| 6 | 4 |
| 7 | -32 |
| 8 | 52 |
| 9 | -4 |
| 10 | 24 |
| 11 | -48 |
| 12 | 20 |
| 13 | -56 |
| 14 | 32 |
| 15 | -24 |
| 16 | 116 |
| 17 | -72 |
| 18 | 4 |
| 19 | -80 |
| 20 | 120 |
| 21 | -32 |
| 22 | 48 |
| 23 | -96 |
| 24 | 52 |
| 25 | -124 |
| 26 | 56 |
| 27 | -4 |
| 28 | 160 |
| 29 | -120 |
| 30 | 24 |
| 31 | -128 |
| 32 | 244 |
| 33 | -48 |
| 34 | 72 |
| 35 | -192 |
| 36 | 20 |
| 37 | -152 |
| 38 | 80 |
| 39 | -56 |
| 40 | 312 |
| 41 | -168 |
| 42 | 32 |
| 43 | -176 |
| 44 | 240 |
| 45 | -24 |
| 46 | 96 |
| 47 | -192 |
| 48 | 116 |
| 49 | -228 |
| 50 | 124 |
| 51 | -72 |
| 52 | 280 |
| 53 | -216 |
| 54 | 4 |