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 | -21063928 |
| 2 | -15312283 |
| 3 | -2213459 |
| 4 | -71 |
| 5 | -3 |
| 6 | -1 |
| 7 | 0 |
| 8 | 1 |
| 9 | 3 |
| 10 | 71 |
| 11 | 2213459 |
| 12 | 15312283 |
| 13 | 21063928 |