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 | 24 |
| 5 | 19 |
| 6 | -6 |
| 7 | -186 |
| 8 | -1656 |
| 9 | -1647 |
| 10 | -1566 |
| 11 | -666 |
| 12 | 10224 |
| 13 | 10211 |
| 14 | 10042 |
| 15 | 7494 |
| 16 | -33456 |
| 17 | -33439 |
| 18 | -33150 |
| 19 | -27642 |
| 20 | 82824 |
| 21 | 82803 |
| 22 | 82362 |
| 23 | 72198 |
| 24 | -172200 |
| 25 | -172175 |
| 26 | -171550 |
| 27 | -154650 |
| 28 | 319200 |
| 29 | 319171 |
| 30 | 318330 |
| 31 | 292230 |
| 32 | -543840 |
| 33 | -543807 |
| 34 | -542718 |
| 35 | -504570 |
| 36 | 869880 |