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 | -1 |
| 5 | -2 |
| 6 | -1 |
| 7 | 1 |
| 8 | 4 |
| 9 | 3 |
| 10 | -1 |
| 11 | -4 |
| 12 | -1 |
| 13 | -3 |
| 14 | 0 |
| 15 | 5 |
| 16 | 5 |
| 17 | 4 |
| 18 | -1 |
| 19 | -5 |
| 20 | -2 |
| 21 | -5 |
| 22 | -1 |
| 23 | 6 |
| 24 | 9 |
| 25 | 1 |
| 26 | -6 |
| 27 | -5 |
| 28 | 13 |
| 29 | 14 |
| 30 | 11 |
| 31 | 1 |
| 32 | -38 |
| 33 | -39 |
| 34 | -1 |
| 35 | 38 |
| 36 | 41 |
| 37 | 81 |
| 38 | 42 |
| 39 | -37 |
| 40 | -163 |
| 41 | -128 |
| 42 | 37 |
| 43 | 167 |
| 44 | 56 |
| 45 | 143 |
| 46 | 11 |
| 47 | -214 |
| 48 | -253 |
| 49 | -219 |
| 50 | 36 |
| 51 | 257 |
| 52 | 149 |
| 53 | 328 |
| 54 | 105 |
| 55 | -303 |
| 56 | -624 |
| 57 | -247 |
| 58 | 313 |
| 59 | 490 |
| 60 | -455 |
| 61 | -387 |
| 62 | -476 |
| 63 | -417 |
| 64 | 1251 |
| 65 | 1250 |