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 | -2 |
| 4 | -2 |
| 5 | -2 |
| 6 | -1 |
| 7 | 2 |
| 8 | 5 |
| 9 | 6 |
| 10 | 7 |
| 11 | 10 |
| 12 | 12 |
| 13 | 8 |
| 14 | -1 |
| 15 | -8 |
| 16 | -11 |
| 17 | -16 |
| 18 | -26 |
| 19 | -38 |
| 20 | -50 |
| 21 | -58 |
| 22 | -52 |
| 23 | -30 |
| 24 | -8 |
| 25 | 0 |
| 26 | 4 |
| 27 | 24 |
| 28 | 63 |
| 29 | 112 |
| 30 | 170 |
| 31 | 232 |
| 32 | 268 |
| 33 | 252 |
| 34 | 208 |
| 35 | 186 |
| 36 | 193 |
| 37 | 190 |
| 38 | 154 |
| 39 | 92 |
| 40 | -5 |
| 41 | -164 |
| 42 | -383 |
| 43 | -630 |
| 44 | -873 |
| 45 | -1062 |
| 46 | -1128 |
| 47 | -1080 |
| 48 | -1055 |
| 49 | -1172 |
| 50 | -1374 |
| 51 | -1508 |
| 52 | -1508 |
| 53 | -1392 |
| 54 | -1139 |
| 55 | -700 |
| 56 | -85 |
| 57 | 684 |
| 58 | 1627 |
| 59 | 2652 |
| 60 | 3455 |