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 | 9 |
| 2 | 44 |
| 3 | 168 |
| 4 | 587 |
| 5 | 1940 |
| 6 | 6192 |
| 7 | 19285 |
| 8 | 59010 |
| 9 | 178122 |
| 10 | 531923 |
| 11 | 1574706 |
| 12 | 4628338 |
| 13 | 13521477 |
| 14 | 39299115 |
| 15 | 113712434 |
| 16 | 327752962 |
| 17 | 941457955 |
| 18 | 2696114317 |
| 19 | 7700146599 |
| 20 | 21938239766 |