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 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 96 |
| 7 | 165 |
| 8 | 321 |
| 9 | 444 |
| 10 | 888 |
| 11 | 1776 |
| 12 | 3453 |
| 13 | 6798 |
| 14 | 13587 |
| 15 | 27165 |
| 16 | 39732 |
| 17 | 63111 |
| 18 | 74247 |
| 19 | 98724 |
| 20 | 123513 |
| 21 | 235848 |
| 22 | 470436 |
| 23 | 504903 |
| 24 | 508362 |
| 25 | 531930 |
| 26 | 545289 |
| 27 | 790878 |
| 28 | 868767 |
| 29 | 1536555 |
| 30 | 2892111 |
| 31 | 4004400 |
| 32 | 4004844 |
| 33 | 4049292 |
| 34 | 4273791 |
| 35 | 5508570 |
| 36 | 5564148 |
| 37 | 7009716 |