870912

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*4^j.at n=39A038222
• Triangle read by rows: T(n, k) = binomial(n, k)*k^k*(n-k)^(n-k-1) k=0..n-1.at n=30A066320
• E.g.f. satisfies: A(x) = x + sinh( A(x) )^2.at n=6A143136
• n! / (Product{k|n} k$). Here '$' denotes the swinging factorial function (A056040).at n=18A163089
• Integer areas A of integer-sided cyclic quadrilaterals such that the length of the circumradius is a perfect square.at n=29A233315
• Number of acute triangles on a centered hexagonal grid of size n.at n=9A241224
• Triangle read by rows: terms T(n,k) of a binomial decomposition of n^n as Sum(k=0..n)T(n,k).at n=42A244137
• Triangle read by rows: T(n,k) is the number of forests of labeled rooted hypertrees with n vertices and weight k, 0 <= k < n.at n=32A364709