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 | 54 |
| 3 | 180 |
| 4 | 378 |
| 5 | 648 |
| 6 | 990 |
| 7 | 1404 |
| 8 | 1890 |
| 9 | 2448 |
| 10 | 3078 |
| 11 | 3780 |
| 12 | 4554 |
| 13 | 5400 |
| 14 | 6318 |
| 15 | 7308 |
| 16 | 8370 |
| 17 | 9504 |
| 18 | 10710 |
| 19 | 11988 |
| 20 | 13338 |
| 21 | 14760 |
| 22 | 16254 |
| 23 | 17820 |
| 24 | 19458 |
| 25 | 21168 |
| 26 | 22950 |
| 27 | 24804 |
| 28 | 26730 |
| 29 | 28728 |
| 30 | 30798 |
| 31 | 32940 |
| 32 | 35154 |
| 33 | 37440 |
| 34 | 39798 |
| 35 | 42228 |
| 36 | 44730 |
| 37 | 47304 |
| 38 | 49950 |
| 39 | 52668 |
| 40 | 55458 |
| 41 | 58320 |
| 42 | 61254 |