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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 0 |
| 4 | 12 |
| 5 | -8 |
| 6 | 20 |
| 7 | -8 |
| 8 | 44 |
| 9 | -40 |
| 10 | 52 |
| 11 | -40 |
| 12 | 76 |
| 13 | -64 |
| 14 | 100 |
| 15 | -64 |
| 16 | 172 |
| 17 | -168 |
| 18 | 180 |
| 19 | -168 |
| 20 | 204 |
| 21 | -192 |
| 22 | 228 |
| 23 | -192 |
| 24 | 300 |
| 25 | -288 |
| 26 | 324 |
| 27 | -288 |
| 28 | 396 |
| 29 | -360 |
| 30 | 468 |
| 31 | -360 |
| 32 | 684 |
| 33 | -680 |
| 34 | 692 |
| 35 | -680 |
| 36 | 716 |
| 37 | -704 |
| 38 | 740 |
| 39 | -704 |
| 40 | 812 |
| 41 | -800 |
| 42 | 836 |
| 43 | -800 |
| 44 | 908 |
| 45 | -872 |
| 46 | 980 |
| 47 | -872 |
| 48 | 1196 |