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 | -31 |
| 3 | 244 |
| 4 | -1055 |
| 5 | 3126 |
| 6 | -7564 |
| 7 | 16808 |
| 8 | -33823 |
| 9 | 59293 |
| 10 | -96906 |
| 11 | 161052 |
| 12 | -257420 |
| 13 | 371294 |
| 14 | -521048 |
| 15 | 762744 |
| 16 | -1082399 |
| 17 | 1419858 |
| 18 | -1838083 |
| 19 | 2476100 |
| 20 | -3297930 |
| 21 | 4101152 |
| 22 | -4992612 |
| 23 | 6436344 |
| 24 | -8252812 |
| 25 | 9768751 |
| 26 | -11510114 |
| 27 | 14408200 |
| 28 | -17732440 |
| 29 | 20511150 |
| 30 | -23645064 |
| 31 | 28629152 |
| 32 | -34636831 |
| 33 | 39296688 |
| 34 | -44015598 |