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 | 44 |
| 3 | 232 |
| 4 | 1216 |
| 5 | 6368 |
| 6 | 33344 |
| 7 | 174592 |
| 8 | 914176 |
| 9 | 4786688 |
| 10 | 25063424 |
| 11 | 131233792 |
| 12 | 687149056 |
| 13 | 3597959168 |
| 14 | 18839158784 |
| 15 | 98643116032 |
| 16 | 516502061056 |
| 17 | 2704439902208 |
| 18 | 14160631169024 |
| 19 | 74146027405312 |
| 20 | 388233639755776 |
| 21 | 2032817728913408 |
| 22 | 10643971814457344 |