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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 0 |
| 5 | -1 |
| 6 | 3 |
| 7 | 7 |
| 8 | -10 |
| 9 | -1 |
| 10 | -7 |
| 11 | -14 |
| 12 | -59 |
| 13 | 21 |
| 14 | 34 |
| 15 | -15 |
| 16 | 103 |
| 17 | -104 |
| 18 | 302 |
| 19 | -38 |
| 20 | -514 |
| 21 | -290 |
| 22 | 1130 |
| 23 | 504 |
| 24 | 2466 |
| 25 | 6813 |
| 26 | -1854 |
| 27 | 1590 |
| 28 | -4879 |
| 29 | 3963 |
| 30 | -4767 |
| 31 | -22709 |