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 | 204 |
| 4 | 1086 |
| 5 | 5916 |
| 6 | 31998 |
| 7 | 173502 |
| 8 | 940005 |
| 9 | 5094220 |
| 10 | 27604798 |
| 11 | 149590922 |
| 12 | 810627389 |
| 13 | 4392774126 |
| 14 | 23804329059 |
| 15 | 128995094597 |
| 16 | 699021261776 |
| 17 | 3787979292364 |
| 18 | 20526967746120 |
| 19 | 111235140046330 |
| 20 | 602780523265720 |
| 21 | 3266453022809170 |
| 22 | 17700829632401740 |
| 23 | 95920366069513405 |