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 | 4 |
| 2 | 8 |
| 3 | 15 |
| 4 | 37 |
| 5 | 114 |
| 6 | 409 |
| 7 | 1657 |
| 8 | 7432 |
| 9 | 36401 |
| 10 | 192713 |
| 11 | 1094076 |
| 12 | 6618379 |
| 13 | 42436913 |
| 14 | 287151994 |
| 15 | 2042803419 |
| 16 | 15229360185 |
| 17 | 118645071202 |
| 18 | 963494800557 |
| 19 | 8138047375093 |
| 20 | 71351480138824 |
| 21 | 648222594284197 |
| 22 | 6092330403828749 |