350576

Appears in sequences

• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=1} (n+1-i)*(n+1-j).at n=37A115004
• Number of permutations of floor(i*7/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique.at n=9A147929