42828

Appears in sequences

• Numbers having four 6's in base 9.at n=10A043480
• Third column (m=4) of array A090452.at n=23A090453
• Recursively defined polynomials, read by row.at n=51A109086
• Number of ordered septuples of distinct pairwise coprime positive integers with largest element n.at n=28A186978
• Number of 6-element subsets of {1, 2, ..., n} having pairwise coprime elements.at n=29A186982
• For 1<=x<=n, 1<=y<=n with gcd(x,y)=1, write 1 = gcd(x,y) = u*x+v*y with u,v minimal; a(n) = m^2*s, where s is the population variance of the values of u+v and m is the number of such values.at n=13A345725