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 | -3 |
| 3 | 3 |
| 4 | -11 |
| 5 | 10 |
| 6 | -40 |
| 7 | 33 |
| 8 | -146 |
| 9 | 107 |
| 10 | -535 |
| 11 | 339 |
| 12 | -1968 |
| 13 | 1040 |
| 14 | -7267 |
| 15 | 3040 |
| 16 | -26937 |
| 17 | 8195 |
| 18 | -100235 |
| 19 | 18754 |
| 20 | -374436 |
| 21 | 25425 |
| 22 | -1404206 |
| 23 | -73577 |
| 24 | -5286619 |
| 25 | -913677 |
| 26 | -19980584 |
| 27 | -5843020 |
| 28 | -75805291 |
| 29 | -31102908 |
| 30 | -288681717 |
| 31 | -151721161 |
| 32 | -1103377699 |
| 33 | -703352678 |
| 34 | -4232153760 |
| 35 | -3154163983 |