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 | 0 |
| 3 | -16 |
| 4 | -8 |
| 5 | 24 |
| 6 | 0 |
| 7 | -32 |
| 8 | 24 |
| 9 | 52 |
| 10 | 0 |
| 11 | -48 |
| 12 | -32 |
| 13 | 56 |
| 14 | 0 |
| 15 | -96 |
| 16 | 24 |
| 17 | 72 |
| 18 | 0 |
| 19 | -80 |
| 20 | -48 |
| 21 | 128 |
| 22 | 0 |
| 23 | -96 |
| 24 | 96 |
| 25 | 124 |
| 26 | 0 |
| 27 | -160 |
| 28 | -64 |
| 29 | 120 |
| 30 | 0 |
| 31 | -128 |
| 32 | 24 |
| 33 | 192 |
| 34 | 0 |
| 35 | -192 |
| 36 | -104 |
| 37 | 152 |
| 38 | 0 |
| 39 | -224 |
| 40 | 144 |
| 41 | 168 |
| 42 | 0 |
| 43 | -176 |
| 44 | -96 |
| 45 | 312 |
| 46 | 0 |
| 47 | -192 |
| 48 | 96 |
| 49 | 228 |
| 50 | 0 |
| 51 | -288 |
| 52 | -112 |
| 53 | 216 |
| 54 | 0 |
| 55 | -288 |
| 56 | 192 |
| 57 | 320 |
| 58 | 0 |