523809

Appears in sequences

• Numbers such that the root mean cube of their prime factors is a nonprime integer (where the root mean cube of c and d is ((c^3+d^3)/2)^(1/3)).at n=4A134613
• Numbers (excluding primes and powers of primes) such that the root mean cube of their prime factors is an integer (where the root mean cube of c and d is ((c^3+d^3)/2)^(1/3)).at n=3A134614
• Number of length-6 0..n arrays with no repeated value differing from the previous repeated value by plus or minus one modulo n+1.at n=7A269692
• Numbers equal to the determinant of a circulant matrix based on the base-9 digits of n.at n=28A303369
• a(n) = Sum_{k=0..n} binomial(5*n+1,k) * binomial(3*n-k,n-k).at n=5A386896