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 | 4 |
| 2 | 12 |
| 3 | 7 |
| 4 | 22 |
| 5 | 14 |
| 6 | 17 |
| 7 | 39 |
| 8 | 0 |
| 9 | 37 |
| 10 | 112 |
| 11 | -337 |
| 12 | 1103 |
| 13 | -2570 |
| 14 | 5868 |
| 15 | -12201 |
| 16 | 24670 |
| 17 | -47528 |
| 18 | 88283 |
| 19 | -155910 |
| 20 | 259140 |
| 21 | -393399 |
| 22 | 512341 |
| 23 | -456546 |
| 24 | -191155 |
| 25 | 2396639 |
| 26 | -8213818 |
| 27 | 21761218 |
| 28 | -50922953 |
| 29 | 110269343 |
| 30 | -225991348 |
| 31 | 444168748 |
| 32 | -844390064 |
| 33 | 1561482582 |
| 34 | -2817844477 |