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 | 2 |
| 3 | -2 |
| 4 | 1 |
| 5 | -2 |
| 6 | 1 |
| 7 | 2 |
| 8 | -2 |
| 9 | 4 |
| 10 | -6 |
| 11 | 4 |
| 12 | -4 |
| 13 | 0 |
| 14 | 5 |
| 15 | -6 |
| 16 | 13 |
| 17 | -14 |
| 18 | 9 |
| 19 | -10 |
| 20 | 1 |
| 21 | 12 |
| 22 | -16 |
| 23 | 26 |
| 24 | -32 |
| 25 | 24 |
| 26 | -19 |
| 27 | 2 |
| 28 | 22 |
| 29 | -34 |
| 30 | 57 |
| 31 | -64 |
| 32 | 48 |
| 33 | -40 |
| 34 | 4 |
| 35 | 44 |
| 36 | -70 |
| 37 | 108 |
| 38 | -124 |
| 39 | 98 |
| 40 | -73 |
| 41 | 6 |
| 42 | 79 |
| 43 | -132 |
| 44 | 205 |
| 45 | -228 |
| 46 | 181 |
| 47 | -134 |
| 48 | 13 |
| 49 | 142 |
| 50 | -245 |
| 51 | 360 |
| 52 | -404 |
| 53 | 330 |
| 54 | -230 |
| 55 | 18 |
| 56 | 241 |
| 57 | -428 |
| 58 | 630 |
| 59 | -694 |
| 60 | 567 |
| 61 | -394 |
| 62 | 35 |
| 63 | 410 |
| 64 | -735 |
| 65 | 1054 |