A075672 Duplicate of A069876.
1, 13, 405, 23058, 2078375, 271739011, 48574262275, 11373936899396
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.