558835200

Appears in sequences

• Expansion of e.g.f.: (1+2*x-2*x^2)/(1-x)^2.at n=11A052572
• E.g.f. (1+x-x^2)^2/(1-x)^2.at n=11A052643
• Expansion of e.g.f. (1-x^4)/(1-x-x^4).at n=11A052692
• a(n) = [r]*[2*r]*...*[n*r], where r=sqrt(2) and []=floor.at n=10A180736
• Product of composite numbers in range n+1 to 2n, exclusive of endpoints.at n=11A238103
• Expansion of e.g.f. Sum_{k>=1} sinh(x^k).at n=11A330254
• Expansion of e.g.f. Sum_{k>=1} arcsin(x^k).at n=11A330506
• Number of binary trees of height n such that the number of nodes at depth d equals d+1 for every d = 0..n.at n=6A338550