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 | 8 |
| 2 | 43 |
| 3 | 161 |
| 4 | 508 |
| 5 | 1505 |
| 6 | 4395 |
| 7 | 12856 |
| 8 | 37808 |
| 9 | 111683 |
| 10 | 331170 |
| 11 | 985275 |
| 12 | 2939862 |
| 13 | 8794582 |
| 14 | 26369119 |
| 15 | 79223520 |
| 16 | 238443031 |
| 17 | 718767456 |
| 18 | 2169574122 |
| 19 | 6556325043 |
| 20 | 19832290886 |
| 21 | 60040894419 |
| 22 | 181897703946 |
| 23 | 551397549898 |
| 24 | 1672317703423 |
| 25 | 5074042241500 |