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 | 1 |
| 2 | 0 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | -8 |
| 7 | -9 |
| 8 | 8 |
| 9 | -7 |
| 10 | -30 |
| 11 | -57 |
| 12 | -56 |
| 13 | -55 |
| 14 | 234 |
| 15 | -233 |
| 16 | 8 |
| 17 | -7 |
| 18 | -190 |
| 19 | -597 |
| 20 | -1458 |
| 21 | -1215 |
| 22 | 6132 |
| 23 | -3169 |
| 24 | 640 |
| 25 | 641 |
| 26 | 1424 |
| 27 | -3489 |
| 28 | -13034 |
| 29 | 13033 |
| 30 | 20730 |
| 31 | -24105 |
| 32 | -1592 |
| 33 | 1593 |
| 34 | -20878 |
| 35 | -60437 |
| 36 | -9042 |
| 37 | -26883 |
| 38 | 1915002 |
| 39 | -6300585 |
| 40 | -1616922 |
| 41 | -1597239 |
| 42 | 8578710 |
| 43 | -15665481 |
| 44 | 9889740 |
| 45 | -3043455 |
| 46 | -4219198 |
| 47 | -377473 |