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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 36 |
| 5 | 192 |
| 6 | 904 |
| 7 | 3712 |
| 8 | 14032 |
| 9 | 51722 |
| 10 | 194536 |
| 11 | 760168 |
| 12 | 3057432 |
| 13 | 12419136 |
| 14 | 50280624 |
| 15 | 202174720 |
| 16 | 809484496 |
| 17 | 3241156320 |
| 18 | 13015284868 |
| 19 | 52449925944 |
| 20 | 211924584048 |
| 21 | 857458176592 |
| 22 | 3471152601384 |
| 23 | 14055938213248 |
| 24 | 56942486482416 |
| 25 | 230837469092362 |
| 26 | 936540163215304 |