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 | -8 |
| 2 | 28 |
| 3 | -64 |
| 4 | 134 |
| 5 | -288 |
| 6 | 568 |
| 7 | -1024 |
| 8 | 1809 |
| 9 | -3152 |
| 10 | 5316 |
| 11 | -8704 |
| 12 | 13990 |
| 13 | -22208 |
| 14 | 34696 |
| 15 | -53248 |
| 16 | 80724 |
| 17 | -121240 |
| 18 | 180068 |
| 19 | -264448 |
| 20 | 384940 |
| 21 | -556064 |
| 22 | 796760 |
| 23 | -1132544 |
| 24 | 1598789 |
| 25 | -2243056 |
| 26 | 3127360 |
| 27 | -4333568 |
| 28 | 5971922 |
| 29 | -8188096 |
| 30 | 11170160 |
| 31 | -15163392 |
| 32 | 20491033 |
| 33 | -27572936 |