A080507 Arithmetic mean of n-th row of A080504.
1, 5, 37, 252, 202502, 2595, 3573588375003, 2219710571718754, 2188822879687504, 29549108875781255, 250366409274156575302546875005, 5789291173553173247164869257812506
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.