544320

Appears in sequences

• a(1) = 1; a(n) = n!*(3/2) for n>=2.at n=8A070960
• Number of n-digit positive integers with all digits distinct.at n=6A073531
• Hook products of all partitions of 13.at n=17A093792
• Hook products of all partitions of 13.at n=18A093792
• The work performed by a function f:{1,...,n} -> {1,...,n} is defined to be work(f) = Sum_{i=1..n} |i - f(i)|; a(n) is equal to sum(work(f)) where the sum is over all functions f:{1,...,n}->{1,...,n}.at n=5A111868
• a(n) = 1*3^(3*n) + 2*3^(2*n) - 3*3^(1*n).at n=3A122038
• Triangle read by rows: T(n,k)=(k+1)*n!/2 (1<=k<=n).at n=37A123316
• Coefficients of a symmetric matrix representation of the 9th falling factorial power, read by antidiagonals.at n=17A145836
• Coefficients of a symmetric matrix representation of the 9th falling factorial power, read by antidiagonals.at n=18A145836
• The sequence is a factorization of a designed multi-bifurcative triangle sequence: t(n,m)=A155582(n,m); f(n, m) = If[m <= Floor[n/2], f(m, 1)*f(n - m, 1)*t(n, m)].at n=25A155583
• A partition product with biggest-part statistic of Stirling_1 type (with parameter k = -2) as well as of Stirling_2 type (with parameter k = -2), (triangle read by rows).at n=42A157400
• Area A of the triangles such that A, the sides and two medians are integers.at n=18A181928
• Triangle of coefficients arising from an expansion of Integral( exp(exp(exp(x))), dx).at n=41A188881
• Triangular array read by rows: T(n,k) is the number of inversion pairs ( p(i) < p(j) with i>j ) that are separated by exactly k elements in all n-permutations (where the permutation is represented in one line notation); n>=2, 0<=k<=n-2.at n=33A202363
• a(n) = v(n+1)/v(n), where v=A203430.at n=7A203431
• The number of edges in the directed graph of the 2-opt landscape of the symmetric TSP.at n=6A213269
• A factorial-like triangle read by rows: T(0,0) = 1; T(n+1,0) = T(n,0)+1; T(n+1,k+1) = T(n,0)*T(n,k), k=0..n.at n=52A245334
• Number of n-digit numbers in base ten having at least five different digits with no leading zeros allowed.at n=1A268358
• Filter-sequence for Stern polynomials: Least number with the same prime signature as A260443(n).at n=43A278243
• Denominators of coefficients in expansion of 1/(1 + 2 cos(sqrt(x))).at n=4A279121