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 | -2 |
| 4 | -3 |
| 5 | -11 |
| 6 | -16 |
| 7 | -51 |
| 8 | -93 |
| 9 | -214 |
| 10 | -419 |
| 11 | -935 |
| 12 | -1812 |
| 13 | -3863 |
| 14 | -7649 |
| 15 | -15698 |
| 16 | -31443 |
| 17 | -63939 |
| 18 | -127676 |
| 19 | -257963 |
| 20 | -516037 |
| 21 | -1037298 |
| 22 | -2076547 |
| 23 | -4165647 |
| 24 | -8335716 |
| 25 | -16702015 |
| 26 | -33421217 |
| 27 | -66911078 |
| 28 | -133875827 |
| 29 | -267921227 |
| 30 | -535987784 |
| 31 | -1072395555 |
| 32 | -2145208557 |
| 33 | -4291436930 |
| 34 | -8584038291 |
| 35 | -17170640199 |
| 36 | -34344407256 |