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 | -2 |
| 2 | -1 |
| 3 | 4 |
| 4 | -3 |
| 5 | 0 |
| 6 | 7 |
| 7 | -8 |
| 8 | -3 |
| 9 | 14 |
| 10 | -14 |
| 11 | -4 |
| 12 | 26 |
| 13 | -26 |
| 14 | -7 |
| 15 | 44 |
| 16 | -41 |
| 17 | -10 |
| 18 | 73 |
| 19 | -72 |
| 20 | -20 |
| 21 | 118 |
| 22 | -109 |
| 23 | -28 |
| 24 | 182 |
| 25 | -174 |
| 26 | -47 |
| 27 | 280 |
| 28 | -260 |
| 29 | -66 |
| 30 | 419 |
| 31 | -392 |
| 32 | -102 |
| 33 | 618 |
| 34 | -568 |
| 35 | -144 |
| 36 | 898 |
| 37 | -832 |
| 38 | -216 |
| 39 | 1292 |
| 40 | -1178 |
| 41 | -296 |
| 42 | 1828 |
| 43 | -1676 |
| 44 | -429 |
| 45 | 2568 |
| 46 | -2334 |
| 47 | -588 |
| 48 | 3570 |
| 49 | -3248 |
| 50 | -822 |
| 51 | 4920 |
| 52 | -4446 |
| 53 | -1114 |
| 54 | 6722 |
| 55 | -6084 |