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 | 4 |
| 1 | 7 |
| 2 | 13 |
| 3 | 3 |
| 4 | 28 |
| 5 | 0 |
| 6 | 57 |
| 7 | -53 |
| 8 | 60 |
| 9 | 0 |
| 10 | 120 |
| 11 | -120 |
| 12 | 120 |
| 13 | 0 |
| 14 | 241 |
| 15 | -357 |
| 16 | 124 |
| 17 | 0 |
| 18 | 248 |
| 19 | -248 |
| 20 | 248 |
| 21 | 0 |
| 22 | 496 |
| 23 | -744 |
| 24 | 248 |
| 25 | 0 |
| 26 | 496 |
| 27 | -496 |
| 28 | 496 |
| 29 | 0 |
| 30 | 993 |
| 31 | -1733 |
| 32 | 252 |
| 33 | 0 |
| 34 | 504 |
| 35 | -504 |
| 36 | 504 |
| 37 | 0 |
| 38 | 1008 |
| 39 | -1512 |
| 40 | 504 |
| 41 | 0 |
| 42 | 1008 |
| 43 | -1008 |
| 44 | 1008 |
| 45 | 0 |
| 46 | 2016 |
| 47 | -3528 |
| 48 | 504 |
| 49 | 0 |
| 50 | 1008 |
| 51 | -1008 |
| 52 | 1008 |
| 53 | 0 |
| 54 | 2016 |
| 55 | -3024 |
| 56 | 1008 |
| 57 | 0 |
| 58 | 2016 |
| 59 | -2016 |