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 | 16 |
| 2 | 40 |
| 3 | 104 |
| 4 | 272 |
| 5 | 712 |
| 6 | 1864 |
| 7 | 4880 |
| 8 | 12776 |
| 9 | 33448 |
| 10 | 87568 |
| 11 | 229256 |
| 12 | 600200 |
| 13 | 1571344 |
| 14 | 4113832 |
| 15 | 10770152 |
| 16 | 28196624 |
| 17 | 73819720 |
| 18 | 193262536 |
| 19 | 505967888 |
| 20 | 1324641128 |
| 21 | 3467955496 |
| 22 | 9079225360 |
| 23 | 23769720584 |
| 24 | 62229936392 |
| 25 | 162920088592 |
| 26 | 426530329384 |
| 27 | 1116670899560 |