51438240

Appears in sequences

• Product of nonzero digits of A066553(n).at n=10A066584
• a(n) is the product of the positive integers each of which is <= n and is divisible by exactly one prime dividing n (but is coprime to every other prime dividing n). (a(1) = 1).at n=20A119794
• G.f.: Sum_{n>=0} (3*n+2)^n * x^n / (1 + (3*n+2)*x)^n.at n=7A187739
• a(n) = product of numbers k < n such that 1 < gcd(k,n) and rad(k) != rad(n).at n=20A381674
• a(n) = Sum_{k=0..floor(n/3)} 3^k * 2^(n-3*k) * binomial(k,n-3*k)^2.at n=26A387482