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 | 1 |
| 1 | 8 |
| 2 | 36 |
| 3 | 148 |
| 4 | 596 |
| 5 | 2388 |
| 6 | 9556 |
| 7 | 38228 |
| 8 | 152916 |
| 9 | 611668 |
| 10 | 2446676 |
| 11 | 9786708 |
| 12 | 39146836 |
| 13 | 156587348 |
| 14 | 626349396 |
| 15 | 2505397588 |
| 16 | 10021590356 |
| 17 | 40086361428 |
| 18 | 160345445716 |
| 19 | 641381782868 |
| 20 | 2565527131476 |
| 21 | 10262108525908 |
| 22 | 41048434103636 |