134710

Appears in sequences

• Let r, s, t be three permutations of the set {1,2,3,..,n}; a(n) = value of Sum_{i=1..n} r(i)*s(i)*t(i), with r={1,2,3,..,n}; s={n,n-1,..,1} and t={n,n-2,n-4,...,1,...,n-3,n-1}.at n=36A070893
• Number of convex functions from {1,...,n} to itself.at n=13A134968
• a(n) = (n+1)*(n^4-4*n^3+11*n^2-8*n+12)/12.at n=18A302612