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 | 3 |
| 2 | 5 |
| 3 | 10 |
| 4 | 24 |
| 5 | 65 |
| 6 | 187 |
| 7 | 552 |
| 8 | 1646 |
| 9 | 4927 |
| 10 | 14769 |
| 11 | 44294 |
| 12 | 132868 |
| 13 | 398589 |
| 14 | 1195751 |
| 15 | 3587236 |
| 16 | 10761690 |
| 17 | 32285051 |
| 18 | 96855133 |
| 19 | 290565378 |
| 20 | 871696112 |
| 21 | 2615088313 |
| 22 | 7845264915 |
| 23 | 23535794720 |
| 24 | 70607384134 |
| 25 | 211822152375 |
| 26 | 635466457097 |