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 | 0 |
| 4 | 1 |
| 5 | -2 |
| 6 | 0 |
| 7 | 1 |
| 8 | -5 |
| 9 | 2 |
| 10 | 0 |
| 11 | 1 |
| 12 | -10 |
| 13 | 5 |
| 14 | 0 |
| 15 | 1 |
| 16 | -19 |
| 17 | 1 |
| 18 | 11 |
| 19 | 0 |
| 20 | 1 |
| 21 | -36 |
| 22 | -46 |
| 23 | 84 |
| 24 | 19 |
| 25 | 0 |
| 26 | 1 |
| 27 | -69 |
| 28 | -272 |
| 29 | 358 |
| 30 | 393 |
| 31 | 29 |
| 32 | 0 |
| 33 | 1 |
| 34 | -134 |
| 35 | -1149 |
| 36 | 916 |
| 37 | 4171 |
| 38 | 1322 |
| 39 | 41 |
| 40 | 0 |
| 41 | 1 |
| 42 | -263 |
| 43 | -4237 |
| 44 | -191 |
| 45 | 31939 |
| 46 | 26255 |
| 47 | 3841 |
| 48 | 55 |
| 49 | 0 |
| 50 | 1 |
| 51 | -520 |
| 52 | -14536 |
| 53 | -20192 |
| 54 | 200252 |
| 55 | 348848 |
| 56 | 130924 |
| 57 | 10280 |
| 58 | 71 |