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 | 3 |
| 4 | 1 |
| 5 | -1 |
| 6 | -6 |
| 7 | -3 |
| 8 | 2 |
| 9 | 9 |
| 10 | 9 |
| 11 | -6 |
| 12 | -24 |
| 13 | -25 |
| 14 | 16 |
| 15 | 72 |
| 16 | 75 |
| 17 | -35 |
| 18 | -213 |
| 19 | -239 |
| 20 | 78 |
| 21 | 627 |
| 22 | 767 |
| 23 | -182 |
| 24 | -1890 |
| 25 | -2477 |
| 26 | 355 |
| 27 | 5847 |
| 28 | 8109 |
| 29 | -360 |
| 30 | -18195 |
| 31 | -26801 |
| 32 | -1225 |
| 33 | 56724 |
| 34 | 89040 |
| 35 | 11431 |
| 36 | -177897 |
| 37 | -297030 |
| 38 | -61857 |
| 39 | 560310 |
| 40 | 994427 |
| 41 | 284075 |
| 42 | -1766754 |
| 43 | -3338212 |
| 44 | -1201932 |