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 | 8 |
| 1 | 18 |
| 2 | 48 |
| 3 | 128 |
| 4 | 338 |
| 5 | 888 |
| 6 | 2328 |
| 7 | 6098 |
| 8 | 15968 |
| 9 | 41808 |
| 10 | 109458 |
| 11 | 286568 |
| 12 | 750248 |
| 13 | 1964178 |
| 14 | 5142288 |
| 15 | 13462688 |
| 16 | 35245778 |
| 17 | 92274648 |
| 18 | 241578168 |
| 19 | 632459858 |
| 20 | 1655801408 |
| 21 | 4334944368 |
| 22 | 11349031698 |
| 23 | 29712150728 |
| 24 | 77787420488 |
| 25 | 203650110738 |
| 26 | 533162911728 |
| 27 | 1395838624448 |