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 | 5 |
| 2 | 25 |
| 3 | 106 |
| 4 | 404 |
| 5 | 1391 |
| 6 | 4383 |
| 7 | 12758 |
| 8 | 34611 |
| 9 | 88206 |
| 10 | 212609 |
| 11 | 487630 |
| 12 | 1069664 |
| 13 | 2254259 |
| 14 | 4581719 |
| 15 | 9011222 |
| 16 | 17200214 |
| 17 | 31944220 |
| 18 | 57853902 |
| 19 | 102380657 |
| 20 | 177341666 |
| 21 | 301156443 |
| 22 | 502075951 |
| 23 | 822789263 |
| 24 | 1326908069 |
| 25 | 2107999291 |
| 26 | 3302022425 |