A067635 a(1) = 1; set of digits of a(n)^2 is a proper subset of the set of digits of a(n+1)^2.
1, 4, 13, 36, 113, 487, 1036, 3267, 10136, 32043
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.