2522520

Appears in sequences

• Denominators of coefficients for numerical differentiation.at n=12A002548
• Denominators of coefficients in -log(1+x)log(1-x) power series.at n=6A069685
• a(n) = n!/(1!*2!*3!*...*k!) where k is the largest integer such that 1!*2!*3!*...*k! divides n!.at n=13A074199
• Duplicate of A002548.at n=12A093763
• Denominators of first difference of squares of harmonic numbers A001008/A002805.at n=13A103933
• Triangle of the RBS1 polynomial coefficients.at n=31A160485
• Number of permutations of 0..floor((n*4-1)/2) on even squares of an n X 4 array such that each row and column of even squares is increasing.at n=7A215288
• T(n,k)=Number of permutations of 0..floor((n*k-1)/2) on even squares of an nXk array such that each row and column of even squares is increasing.at n=58A215292
• T(n,k) = number of permutations of 0..floor((n*k-2)/2) on odd squares of an n X k array such that each row and column of odd squares is increasing.at n=58A215297
• Triangle S(n, k) by rows: coefficients of 2^(n/2)*(x^(1/2)*d/dx)^n, where n =0, 2, 4, 6, ...at n=31A223524
• Triangle T(n,k) giving denominator of integral_{x=0..1} B(n,x)*B(k,x) dx, B = Bernoulli polynomial, n >= 1, 1 <= k <= n.at n=20A225750
• a(n) is the least number k > 0 such that sigma(k/n) = phi(k).at n=20A241762
• a(n) = f(4*n+2)/(f(n-1)*f(n)*f(n+1)*f(n+2)), where f(k) = k!.at n=2A248708
• Number T(n,k) of partitions of an n-set with distinct block sizes and maximal block size equal to k; triangle T(n,k), k>=0, k<=n<=k*(k+1)/2, read by columns.at n=24A262078
• Maximum value of the multinomial coefficients M(n;lambda), where lambda ranges over all partitions of n into distinct parts.at n=14A290517
• Triangle read by rows: T(n,k) is the number of tree-rooted planar maps with n edges and k+1 faces, n >= 0, k = 0..n.at n=40A342982
• Number of tree-rooted planar maps with n+1 vertices and n+1 faces.at n=4A342983
• Triangular array read by rows: T(n,k) is the number of derangements whose shortest cycle has exactly k nodes; n >= 1, 1 <= k <= n.at n=57A348075
• Noncubefree numbers k such that A073185(k) > 2*k.at n=4A357700
• Numbers such that the three numbers before and the three numbers after are squarefree semiprimes.at n=21A358657