A093535 Duplicate of A081093.
3, 7, 31, 127, 3583, 8191, 131071, 524287, 14680063, 1073479679, 2147483647
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.