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 | -2 |
| 2 | -1 |
| 3 | -2 |
| 4 | 7 |
| 5 | 2 |
| 6 | 10 |
| 7 | -8 |
| 8 | 5 |
| 9 | -40 |
| 10 | -4 |
| 11 | -54 |
| 12 | 52 |
| 13 | -30 |
| 14 | 162 |
| 15 | -12 |
| 16 | 292 |
| 17 | -142 |
| 18 | 270 |
| 19 | -576 |
| 20 | 168 |
| 21 | -1228 |
| 22 | 305 |
| 23 | -1702 |
| 24 | 1435 |
| 25 | -1664 |
| 26 | 3839 |
| 27 | -1444 |
| 28 | 7303 |
| 29 | -2752 |
| 30 | 10117 |
| 31 | -8420 |
| 32 | 11065 |
| 33 | -20714 |
| 34 | 11066 |
| 35 | -38702 |
| 36 | 17057 |
| 37 | -57276 |
| 38 | 40310 |
| 39 | -69898 |
| 40 | 94138 |
| 41 | -77014 |
| 42 | 181926 |
| 43 | -97480 |