A180697 Smallest power of 15 that begins with n.
1, 225, 3375, 437893890380859375, 50625, 6568408355712890625, 759375, 8649755859375, 98526125335693359375, 10894361101313487863732444325959303199624628177843987941741943359375
Offset: 1
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.