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 | 4 |
| 2 | 10 |
| 3 | 28 |
| 4 | 96 |
| 5 | 126 |
| 6 | 540 |
| 7 | 906 |
| 8 | 1150 |
| 9 | 1360 |
| 10 | 9586 |
| 11 | 15726 |
| 12 | 19660 |
| 13 | 31468 |
| 14 | 156006 |
| 15 | 360748 |
| 16 | 370372 |
| 17 | 492226 |
| 18 | 1349650 |
| 19 | 1357332 |
| 20 | 2010880 |
| 21 | 4652506 |
| 22 | 17051886 |
| 23 | 20831532 |
| 24 | 47326912 |
| 25 | 122164968 |
| 26 | 189695892 |
| 27 | 191913030 |