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 | 53 |
| 4 | -64 |
| 5 | 249 |
| 6 | -53 |
| 7 | 685 |
| 8 | -960 |
| 9 | 2133 |
| 10 | -249 |
| 11 | 2661 |
| 12 | -3392 |
| 13 | 4393 |
| 14 | -685 |
| 15 | 13197 |
| 16 | -11264 |
| 17 | 9825 |
| 18 | -2133 |
| 19 | 13717 |
| 20 | -15936 |
| 21 | 36305 |
| 22 | -2661 |
| 23 | 24333 |
| 24 | -50880 |
| 25 | 46625 |
| 26 | -4393 |
| 27 | 76545 |
| 28 | -43840 |
| 29 | 48777 |
| 30 | -13197 |
| 31 | 59581 |
| 32 | -118784 |
| 33 | 141033 |
| 34 | -9825 |
| 35 | 170565 |
| 36 | -136512 |
| 37 | 101305 |
| 38 | -13717 |
| 39 | 232829 |