931840

Appears in sequences

• A transform of C(n,3).at n=12A082138
• Numbers n such that the set of prime divisors of n is equal to the set of prime divisors of sum of proper divisors of n while n is not in A027598.at n=33A286876
• a(n) is the smallest x such that sigma(x)/x = (3/2)*sigma(n)/n where sigma(n) is the sum of divisors of n or -1 if no such x exists.at n=31A349717
• a(n) = n*(n^2 - 3*n + 10)*2^(n-4).at n=13A383778