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 | 8 |
| 4 | 24 |
| 5 | 48 |
| 6 | 124 |
| 7 | 312 |
| 8 | 834 |
| 9 | 2184 |
| 10 | 5928 |
| 11 | 16104 |
| 12 | 44344 |
| 13 | 122640 |
| 14 | 341796 |
| 15 | 956576 |
| 16 | 2690844 |
| 17 | 7596480 |
| 18 | 21524412 |
| 19 | 61171656 |
| 20 | 174342192 |
| 21 | 498111952 |
| 22 | 1426419852 |
| 23 | 4093181688 |
| 24 | 11767919284 |
| 25 | 33891544368 |
| 26 | 97764131640 |
| 27 | 282429535752 |
| 28 | 817028472936 |
| 29 | 2366564736720 |
| 30 | 6863038212784 |