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 | -4 |
| 2 | 1 |
| 3 | -5 |
| 4 | 5 |
| 5 | -6 |
| 6 | 10 |
| 7 | -11 |
| 8 | 16 |
| 9 | -21 |
| 10 | 27 |
| 11 | -37 |
| 12 | 48 |
| 13 | -64 |
| 14 | 85 |
| 15 | -112 |
| 16 | 149 |
| 17 | -197 |
| 18 | 261 |
| 19 | -346 |
| 20 | 458 |
| 21 | -607 |
| 22 | 804 |
| 23 | -1065 |
| 24 | 1411 |
| 25 | -1869 |
| 26 | 2476 |
| 27 | -3280 |
| 28 | 4345 |
| 29 | -5756 |
| 30 | 7625 |
| 31 | -10101 |
| 32 | 13381 |
| 33 | -17726 |
| 34 | 23482 |
| 35 | -31107 |
| 36 | 41208 |