A018848 Strobogrammatic squares: the same upside down (probably finite).
0, 1, 6889, 69169, 109181601
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.
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