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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 6 |
| 7 | 7 |
| 8 | 4 |
| 9 | -8 |
| 10 | -36 |
| 11 | -87 |
| 12 | -162 |
| 13 | -244 |
| 14 | -278 |
| 15 | -145 |
| 16 | 360 |
| 17 | 1520 |
| 18 | 3608 |
| 19 | 6641 |
| 20 | 9882 |
| 21 | 11028 |
| 22 | 5166 |
| 23 | -16073 |
| 24 | -64084 |
| 25 | -149528 |
| 26 | -272076 |
| 27 | -399911 |
| 28 | -436682 |
| 29 | -179684 |
| 30 | 712530 |
| 31 | 2698335 |
| 32 | 6192720 |
| 33 | 11140064 |
| 34 | 16170928 |
| 35 | 17258081 |
| 36 | 6043314 |
| 37 | -31395292 |
| 38 | -113477674 |