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 | 1 |
| 2 | 0 |
| 3 | -3 |
| 4 | -6 |
| 5 | -4 |
| 6 | 12 |
| 7 | 39 |
| 8 | 52 |
| 9 | -9 |
| 10 | -186 |
| 11 | -392 |
| 12 | -285 |
| 13 | 610 |
| 14 | 2291 |
| 15 | 3200 |
| 16 | -150 |
| 17 | -10626 |
| 18 | -23487 |
| 19 | -18841 |
| 20 | 32957 |
| 21 | 134848 |
| 22 | 198246 |
| 23 | 13961 |
| 24 | -605248 |
| 25 | -1409604 |
| 26 | -1234474 |
| 27 | 1744213 |
| 28 | 7898753 |
| 29 | 12209679 |
| 30 | 2161666 |
| 31 | -34344627 |
| 32 | -84393284 |
| 33 | -79993042 |
| 34 | 90692470 |
| 35 | 461463974 |
| 36 | 749309529 |
| 37 | 207447895 |
| 38 | -1939084232 |