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 | -33 |
| 3 | 244 |
| 4 | -993 |
| 5 | 3126 |
| 6 | -8052 |
| 7 | 16808 |
| 8 | -31713 |
| 9 | 59293 |
| 10 | -103158 |
| 11 | 161052 |
| 12 | -242292 |
| 13 | 371294 |
| 14 | -554664 |
| 15 | 762744 |
| 16 | -1014753 |
| 17 | 1419858 |
| 18 | -1956669 |
| 19 | 2476100 |
| 20 | -3104118 |
| 21 | 4101152 |
| 22 | -5314716 |
| 23 | 6436344 |
| 24 | -7737972 |
| 25 | 9768751 |
| 26 | -12252702 |
| 27 | 14408200 |
| 28 | -16690344 |
| 29 | 20511150 |