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 | 3 |
| 1 | 22 |
| 2 | 173 |
| 3 | 1362 |
| 4 | 10723 |
| 5 | 84422 |
| 6 | 664653 |
| 7 | 5232802 |
| 8 | 41197763 |
| 9 | 324349302 |
| 10 | 2553596653 |
| 11 | 20104423922 |
| 12 | 158281794723 |
| 13 | 1246149933862 |
| 14 | 9810917676173 |
| 15 | 77241191475522 |
| 16 | 608118614128003 |
| 17 | 4787707721548502 |
| 18 | 37693543158260013 |
| 19 | 296760637544531602 |
| 20 | 2336391557197992803 |