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) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -3 |
| 3 | -3 |
| 4 | -4 |
| 5 | 3 |
| 6 | 2 |
| 7 | 19 |
| 8 | 21 |
| 9 | 32 |
| 10 | 40 |
| 11 | 45 |
| 12 | 16 |
| 13 | 8 |
| 14 | -18 |
| 15 | -125 |
| 16 | -164 |
| 17 | -291 |
| 18 | -358 |
| 19 | -530 |
| 20 | -588 |
| 21 | -724 |
| 22 | -592 |
| 23 | -675 |
| 24 | -358 |
| 25 | -207 |
| 26 | 570 |
| 27 | 1201 |
| 28 | 2208 |
| 29 | 3333 |
| 30 | 4944 |
| 31 | 6490 |
| 32 | 8277 |
| 33 | 10492 |
| 34 | 11800 |
| 35 | 13260 |
| 36 | 14328 |
| 37 | 14722 |
| 38 | 12942 |
| 39 | 12075 |
| 40 | 5640 |
| 41 | 603 |
| 42 | -10444 |
| 43 | -21120 |
| 44 | -39360 |
| 45 | -55876 |
| 46 | -83488 |