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) |
|---|---|
| 13 | 1 |
| 14 | -13 |
| 15 | 78 |
| 16 | -286 |
| 17 | 702 |
| 18 | -1131 |
| 19 | 845 |
| 20 | 1300 |
| 21 | -5928 |
| 22 | 11583 |
| 23 | -13715 |
| 24 | 5915 |
| 25 | 15834 |
| 26 | -47477 |
| 27 | 73658 |
| 28 | -71201 |
| 29 | 20436 |
| 30 | 79391 |
| 31 | -198796 |
| 32 | 280345 |
| 33 | -258557 |
| 34 | 92807 |
| 35 | 200850 |
| 36 | -536341 |
| 37 | 773916 |
| 38 | -768222 |
| 39 | 432705 |
| 40 | 204477 |
| 41 | -979628 |
| 42 | 1626196 |
| 43 | -1856569 |
| 44 | 1471184 |
| 45 | -452192 |