A117480 A093483(n) + 1.
3, 5, 9, 15, 39, 99, 345, 22269, 79809, 187125, 347979, 2171619, 4219797675, 98059918335
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.