[seqfan] sigma(n) < min(sigma(n-1),sigma(n+1)), n=10*m?

zak seidov zakseidov at yahoo.com
Sat Oct 9 11:53:01 CEST 2010

Dear seqfans,

What is the least n of the form n=10*m, such that 

sigma(n) < min(sigma(n-1),sigma(n+1))?

(That is, sigma(n) is the strict local minimum;
sigma(n) = A00203(n) )

First let's find at least one such n and then 
let's try to improve the limit!



More information about the SeqFan mailing list