A083369 Essentially a duplicate of A000946.
1, 2, 3, 7, 43, 139, 50207, 340999, 2365347734339, 4680225641471129, 1368845206580129
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.