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 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 18 |
| 4 | 34 |
| 5 | 39 |
| 6 | 6 |
| 7 | -97 |
| 8 | -300 |
| 9 | -633 |
| 10 | -1138 |
| 11 | -1881 |
| 12 | -2952 |
| 13 | -4452 |
| 14 | -6480 |
| 15 | -9135 |
| 16 | -12534 |
| 17 | -16830 |
| 18 | -22212 |
| 19 | -28886 |
| 20 | -37056 |
| 21 | -46926 |
| 22 | -58724 |
| 23 | -72726 |
| 24 | -89256 |
| 25 | -108661 |
| 26 | -131286 |
| 27 | -157476 |
| 28 | -187606 |
| 29 | -222111 |
| 30 | -261486 |
| 31 | -306255 |
| 32 | -356940 |
| 33 | -414063 |
| 34 | -478182 |
| 35 | -549927 |
| 36 | -630000 |
| 37 | -719138 |
| 38 | -818076 |