A034670 Duplicate of A020516.
7, 127, 5461, 299593, 17895697, 1108378657, 69810262081, 4432676798593
Offset: 0
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.