111744

Appears in sequences

• Numbers such that the largest prime factor equals the sum of the 4th power of the other prime factors.at n=34A244344
• E.g.f.: A(x,y) = exp(y)*P(x) - Q(x,y), where P(x) = 1/Product_{n>=1} (1 - x^n/n) and Q(x,y) = Sum_{n>=1} y^n / Product_{k=1..n} (k - x^k).at n=48A249480
• a(n) = Sum_{k=0..floor(n/3)} 2^k * binomial(2*k+1,2*n-6*k+1).at n=21A387769