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 | 22 |
| 3 | 62 |
| 4 | 176 |
| 5 | 502 |
| 6 | 1436 |
| 7 | 4116 |
| 8 | 11814 |
| 9 | 33942 |
| 10 | 97582 |
| 11 | 280676 |
| 12 | 807574 |
| 13 | 2324116 |
| 14 | 6689624 |
| 15 | 19257202 |
| 16 | 55439298 |
| 17 | 159611886 |
| 18 | 459545688 |
| 19 | 1323132230 |
| 20 | 3809653732 |
| 21 | 10969153364 |
| 22 | 31583803574 |
| 23 | 90940708414 |
| 24 | 261850874726 |
| 25 | 753964626300 |