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 | -1 |
| 2 | 0 |
| 3 | -1 |
| 4 | 0 |
| 5 | -1 |
| 6 | 1 |
| 7 | -2 |
| 8 | 0 |
| 9 | -2 |
| 10 | 2 |
| 11 | -3 |
| 12 | 1 |
| 13 | -2 |
| 14 | 2 |
| 15 | -6 |
| 16 | 2 |
| 17 | -3 |
| 18 | 7 |
| 19 | -8 |
| 20 | 2 |
| 21 | -12 |
| 22 | 12 |
| 23 | -13 |
| 24 | 0 |
| 25 | -3 |
| 26 | 4 |
| 27 | -12 |
| 28 | 17 |
| 29 | -18 |
| 30 | 19 |
| 31 | -20 |
| 32 | -19 |
| 33 | -13 |
| 34 | 34 |
| 35 | -71 |
| 36 | 54 |
| 37 | -55 |
| 38 | 8 |
| 39 | -67 |
| 40 | 73 |
| 41 | -74 |
| 42 | 79 |
| 43 | -80 |
| 44 | -72 |
| 45 | -154 |
| 46 | 238 |
| 47 | -239 |
| 48 | 39 |
| 49 | -119 |
| 50 | 163 |
| 51 | -237 |
| 52 | 97 |
| 53 | -98 |
| 54 | 310 |
| 55 | -402 |
| 56 | -22 |
| 57 | -297 |
| 58 | 336 |
| 59 | -337 |
| 60 | 271 |
| 61 | -272 |
| 62 | 20 |
| 63 | -659 |
| 64 | 369 |
| 65 | -738 |