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 | -4 |
| 5 | -5 |
| 6 | 1 |
| 7 | 9 |
| 8 | 11 |
| 9 | -4 |
| 10 | -25 |
| 11 | -31 |
| 12 | 9 |
| 13 | 64 |
| 14 | 79 |
| 15 | -25 |
| 16 | -169 |
| 17 | -209 |
| 18 | 64 |
| 19 | 441 |
| 20 | 545 |
| 21 | -169 |
| 22 | -1156 |
| 23 | -1429 |
| 24 | 441 |
| 25 | 3025 |
| 26 | 3739 |
| 27 | -1156 |
| 28 | -7921 |
| 29 | -9791 |
| 30 | 3025 |
| 31 | 20736 |
| 32 | 25631 |
| 33 | -7921 |
| 34 | -54289 |
| 35 | -67105 |
| 36 | 20736 |
| 37 | 142129 |
| 38 | 175681 |
| 39 | -54289 |
| 40 | -372100 |
| 41 | -459941 |
| 42 | 142129 |
| 43 | 974169 |
| 44 | 1204139 |