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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 2 |
| 5 | -14 |
| 6 | -114 |
| 7 | -107 |
| 8 | -58 |
| 9 | 390 |
| 10 | 380 |
| 11 | 280 |
| 12 | -930 |
| 13 | -917 |
| 14 | -748 |
| 15 | 1800 |
| 16 | 1784 |
| 17 | 1528 |
| 18 | -3096 |
| 19 | -3077 |
| 20 | -2716 |
| 21 | 4884 |
| 22 | 4862 |
| 23 | 4378 |
| 24 | -7260 |
| 25 | -7235 |
| 26 | -6610 |
| 27 | 10290 |
| 28 | 10262 |
| 29 | 9478 |
| 30 | -14070 |
| 31 | -14039 |
| 32 | -13078 |
| 33 | 18666 |
| 34 | 18632 |
| 35 | 17476 |
| 36 | -24174 |
| 37 | -24137 |
| 38 | -22768 |
| 39 | 30660 |
| 40 | 30620 |
| 41 | 29020 |