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 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | -1 |
| 4 | -1 |
| 5 | 3 |
| 6 | 3 |
| 7 | -1 |
| 8 | -8 |
| 9 | -8 |
| 10 | 12 |
| 11 | 24 |
| 12 | 5 |
| 13 | -43 |
| 14 | -55 |
| 15 | 40 |
| 16 | 137 |
| 17 | 65 |
| 18 | -215 |
| 19 | -356 |
| 20 | 97 |
| 21 | 780 |
| 22 | 624 |
| 23 | -941 |
| 24 | -2199 |
| 25 | -260 |
| 26 | 4052 |
| 27 | 4638 |
| 28 | -3536 |
| 29 | -12861 |
| 30 | -5676 |
| 31 | 19858 |
| 32 | 31449 |
| 33 | -8337 |
| 34 | -71220 |
| 35 | -54243 |
| 36 | 87733 |
| 37 | 196679 |
| 38 | 20733 |
| 39 | -372807 |
| 40 | -413794 |
| 41 | 330731 |
| 42 | 1159718 |
| 43 | 497517 |
| 44 | -1821469 |