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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | -2 |
| 5 | 1 |
| 6 | 0 |
| 7 | 5 |
| 8 | -4 |
| 9 | 1 |
| 10 | 3 |
| 11 | -8 |
| 12 | 12 |
| 13 | -6 |
| 14 | 1 |
| 15 | 0 |
| 16 | 14 |
| 17 | -28 |
| 18 | 23 |
| 19 | -8 |
| 20 | 1 |
| 21 | 4 |
| 22 | -20 |
| 23 | 58 |
| 24 | -68 |
| 25 | 38 |
| 26 | -10 |
| 27 | 1 |
| 28 | 0 |
| 29 | 30 |
| 30 | -108 |
| 31 | 171 |
| 32 | -136 |
| 33 | 57 |
| 34 | -12 |
| 35 | 1 |
| 36 | 5 |
| 37 | -40 |
| 38 | 188 |
| 39 | -382 |
| 40 | 405 |
| 41 | -240 |
| 42 | 80 |
| 43 | -14 |
| 44 | 1 |
| 45 | 0 |
| 46 | 55 |
| 47 | -308 |
| 48 | 781 |
| 49 | -1056 |
| 50 | 828 |
| 51 | -388 |
| 52 | 107 |
| 53 | -16 |
| 54 | 1 |
| 55 | 6 |
| 56 | -70 |
| 57 | 483 |
| 58 | -1488 |
| 59 | 2488 |
| 60 | -2472 |
| 61 | 1524 |
| 62 | -588 |
| 63 | 138 |
| 64 | -18 |
| 65 | 1 |
| 66 | 0 |
| 67 | 91 |
| 68 | -728 |
| 69 | 2678 |
| 70 | -5408 |