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 | -2 |
| 2 | -3 |
| 3 | -3 |
| 4 | 8 |
| 5 | 11 |
| 6 | 11 |
| 7 | -30 |
| 8 | -41 |
| 9 | -41 |
| 10 | 112 |
| 11 | 153 |
| 12 | 153 |
| 13 | -418 |
| 14 | -571 |
| 15 | -571 |
| 16 | 1560 |
| 17 | 2131 |
| 18 | 2131 |
| 19 | -5822 |
| 20 | -7953 |
| 21 | -7953 |
| 22 | 21728 |
| 23 | 29681 |
| 24 | 29681 |
| 25 | -81090 |
| 26 | -110771 |
| 27 | -110771 |
| 28 | 302632 |
| 29 | 413403 |
| 30 | 413403 |
| 31 | -1129438 |
| 32 | -1542841 |
| 33 | -1542841 |
| 34 | 4215120 |
| 35 | 5757961 |
| 36 | 5757961 |