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 | -7 |
| 1 | -29 |
| 2 | -67 |
| 3 | -185 |
| 4 | -475 |
| 5 | -1253 |
| 6 | -3271 |
| 7 | -8573 |
| 8 | -22435 |
| 9 | -58745 |
| 10 | -153787 |
| 11 | -402629 |
| 12 | -1054087 |
| 13 | -2759645 |
| 14 | -7224835 |
| 15 | -18914873 |
| 16 | -49519771 |
| 17 | -129644453 |
| 18 | -339413575 |
| 19 | -888596285 |
| 20 | -2326375267 |
| 21 | -6090529529 |
| 22 | -15945213307 |
| 23 | -41745110405 |
| 24 | -109290117895 |
| 25 | -286125243293 |