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 | -2 |
| 3 | 1 |
| 4 | -8 |
| 5 | 1 |
| 6 | -26 |
| 7 | -4 |
| 8 | 1 |
| 9 | -66 |
| 10 | -36 |
| 11 | 1 |
| 12 | -174 |
| 13 | -196 |
| 14 | 1 |
| 15 | -398 |
| 16 | -676 |
| 17 | 1 |
| 18 | -878 |
| 19 | -3044 |
| 20 | 1 |
| 21 | -2174 |
| 22 | -6852 |
| 23 | -192 |
| 24 | 1 |
| 25 | -4862 |
| 26 | -18628 |
| 27 | -704 |
| 28 | 1 |
| 29 | -10494 |
| 30 | -45508 |
| 31 | -1216 |
| 32 | 1 |
| 33 | -22014 |
| 34 | -141252 |
| 35 | -6336 |
| 36 | 1 |
| 37 | -47614 |
| 38 | -315332 |
| 39 | -10432 |
| 40 | 1 |
| 41 | -100862 |
| 42 | -858052 |
| 43 | -55488 |
| 44 | 1 |
| 45 | -225278 |
| 46 | -1878980 |
| 47 | -245952 |