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 | -1 |
| 3 | 1 |
| 4 | -18 |
| 5 | 1 |
| 6 | 1 |
| 7 | -116 |
| 8 | 84 |
| 9 | -1 |
| 10 | 1 |
| 11 | -538 |
| 12 | 1347 |
| 13 | -250 |
| 14 | 1 |
| 15 | 1 |
| 16 | -2256 |
| 17 | 11566 |
| 18 | -8216 |
| 19 | 585 |
| 20 | -1 |
| 21 | 1 |
| 22 | -9158 |
| 23 | 75453 |
| 24 | -118722 |
| 25 | 35086 |
| 26 | -1176 |
| 27 | 1 |
| 28 | 1 |
| 29 | -36796 |
| 30 | 426288 |
| 31 | -1152432 |
| 32 | 801084 |
| 33 | -118656 |
| 34 | 2128 |
| 35 | -1 |
| 36 | 1 |
| 37 | -147378 |
| 38 | 2214919 |
| 39 | -8910538 |
| 40 | 11175711 |
| 41 | -4079622 |
| 42 | 339762 |
| 43 | -3564 |
| 44 | 1 |
| 45 | 1 |
| 46 | -589736 |
| 47 | 10915650 |