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 | -2 |
| 4 | -3 |
| 5 | -2 |
| 6 | 3 |
| 7 | 8 |
| 8 | 8 |
| 9 | -2 |
| 10 | -16 |
| 11 | -24 |
| 12 | -10 |
| 13 | 24 |
| 14 | 59 |
| 15 | 54 |
| 16 | -11 |
| 17 | -117 |
| 18 | -174 |
| 19 | -90 |
| 20 | 162 |
| 21 | 431 |
| 22 | 449 |
| 23 | -20 |
| 24 | -835 |
| 25 | -1393 |
| 26 | -848 |
| 27 | 1062 |
| 28 | 3352 |
| 29 | 3748 |
| 30 | 317 |
| 31 | -6257 |
| 32 | -11134 |
| 33 | -7583 |
| 34 | 7294 |
| 35 | 25956 |
| 36 | 30786 |
| 37 | 5217 |
| 38 | -46545 |
| 39 | -88132 |
| 40 | -65062 |
| 41 | 48534 |
| 42 | 199234 |
| 43 | 249263 |
| 44 | 63034 |
| 45 | -342174 |
| 46 | -691679 |
| 47 | -554002 |