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 | 2 |
| 2 | 12 |
| 3 | 32 |
| 4 | 108 |
| 5 | 342 |
| 6 | 1104 |
| 7 | 3544 |
| 8 | 11396 |
| 9 | 36626 |
| 10 | 117732 |
| 11 | 378424 |
| 12 | 1216380 |
| 13 | 3909830 |
| 14 | 12567448 |
| 15 | 40395792 |
| 16 | 129844996 |
| 17 | 417363330 |
| 18 | 1341539196 |
| 19 | 4312135920 |
| 20 | 13860583628 |
| 21 | 44552347606 |
| 22 | 143205490528 |
| 23 | 460308235560 |
| 24 | 1479577849604 |
| 25 | 4755836293842 |
| 26 | 15286778495572 |