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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | -2 |
| 4 | -1 |
| 5 | 6 |
| 6 | -3 |
| 7 | -8 |
| 8 | 12 |
| 9 | 2 |
| 10 | -22 |
| 11 | 16 |
| 12 | 22 |
| 13 | -42 |
| 14 | 2 |
| 15 | 58 |
| 16 | -51 |
| 17 | -42 |
| 18 | 106 |
| 19 | -20 |
| 20 | -131 |
| 21 | 124 |
| 22 | 84 |
| 23 | -232 |
| 24 | 56 |
| 25 | 276 |
| 26 | -271 |
| 27 | -176 |
| 28 | 486 |
| 29 | -120 |
| 30 | -561 |
| 31 | 566 |
| 32 | 340 |
| 33 | -984 |
| 34 | 257 |
| 35 | 1094 |
| 36 | -1121 |
| 37 | -618 |
| 38 | 1890 |
| 39 | -536 |
| 40 | -2038 |
| 41 | 2112 |
| 42 | 1102 |
| 43 | -3462 |
| 44 | 1028 |
| 45 | 3672 |
| 46 | -3846 |
| 47 | -1946 |
| 48 | 6178 |
| 49 | -1862 |
| 50 | -6457 |