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 | -5 |
| 3 | -10 |
| 4 | 3 |
| 5 | 42 |
| 6 | 124 |
| 7 | 160 |
| 8 | 15 |
| 9 | -677 |
| 10 | -1941 |
| 11 | -3425 |
| 12 | -2807 |
| 13 | 3488 |
| 14 | 21004 |
| 15 | 49547 |
| 16 | 77879 |
| 17 | 63395 |
| 18 | -65104 |
| 19 | -406091 |
| 20 | -988889 |
| 21 | -1655508 |
| 22 | -1779329 |
| 23 | -145347 |
| 24 | 5087175 |
| 25 | 15405270 |
| 26 | 30158849 |
| 27 | 42617486 |
| 28 | 36116136 |
| 29 | -19457047 |
| 30 | -161973496 |
| 31 | -418712896 |
| 32 | -759063566 |