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 | -4 |
| 3 | -4 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | -24 |
| 8 | 26 |
| 9 | -9 |
| 10 | 1 |
| 11 | 1 |
| 12 | -109 |
| 13 | -49 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | -524 |
| 18 | 246 |
| 19 | -29 |
| 20 | 1 |
| 21 | 1 |
| 22 | -2504 |
| 23 | -619 |
| 24 | -4 |
| 25 | 1 |
| 26 | 1 |
| 27 | -11979 |
| 28 | 2621 |
| 29 | -99 |
| 30 | 1 |
| 31 | 1 |
| 32 | -57299 |
| 33 | -7774 |
| 34 | -34 |
| 35 | 1 |
| 36 | 1 |
| 37 | -274084 |
| 38 | 30126 |
| 39 | -349 |
| 40 | 1 |
| 41 | 1 |
| 42 | -1311049 |
| 43 | -97879 |
| 44 | -179 |
| 45 | 1 |
| 46 | 1 |
| 47 | -6271254 |
| 48 | 363131 |
| 49 | -1254 |
| 50 | 1 |
| 51 | 1 |
| 52 | -29997829 |
| 53 | -1237504 |
| 54 | -824 |
| 55 | 1 |