202529

Properties

Appears in sequences

• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=1} (n+1-i)*(n+1-j).at n=32A115004
• a(1)=2; a(n)=smallest prime greater than the half-sum of all previous terms.at n=29A196375
• a(n) = A115004(2n+1).at n=16A331759
• Prime numbersat n=18187