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 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | -1 |
| 6 | -2 |
| 7 | -3 |
| 8 | -3 |
| 9 | -2 |
| 10 | 0 |
| 11 | 3 |
| 12 | 6 |
| 13 | 8 |
| 14 | 8 |
| 15 | 5 |
| 16 | -1 |
| 17 | -9 |
| 18 | -17 |
| 19 | -22 |
| 20 | -21 |
| 21 | -12 |
| 22 | 5 |
| 23 | 27 |
| 24 | 48 |
| 25 | 60 |
| 26 | 55 |
| 27 | 28 |
| 28 | -20 |
| 29 | -80 |
| 30 | -135 |
| 31 | -163 |
| 32 | -143 |
| 33 | -63 |
| 34 | 72 |
| 35 | 235 |
| 36 | 378 |
| 37 | 441 |
| 38 | 369 |
| 39 | 134 |
| 40 | -244 |
| 41 | -685 |
| 42 | -1054 |
| 43 | -1188 |
| 44 | -944 |
| 45 | -259 |
| 46 | 795 |
| 47 | 1983 |
| 48 | 2927 |
| 49 | 3186 |
| 50 | 2391 |
| 51 | 408 |
| 52 | -2519 |
| 53 | -5705 |
| 54 | -8096 |
| 55 | -8504 |
| 56 | -5985 |
| 57 | -280 |
| 58 | 7816 |
| 59 | 16320 |
| 60 | 22305 |
| 61 | 22585 |
| 62 | 14769 |