21814

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=22A070893
• Expansion of (1+x+x^2)/((1+x^2)*(1+x)^4*(1-x)^5).at n=44A082290
• Let f(n) = exp(Pi*sqrt(n)); sequence gives numbers n such that f(n) - floor(f(n)) < 1/10^3.at n=25A127028
• a(n) = 839*n.at n=26A135639
• 1/128 the number of (n+2) X 3 binary arrays with no 3 X 3 subblock trace equal to any horizontal or vertical neighbor 3 X 3 subblock trace.at n=5A185858
• 1/128 the number of (n+2)X8 binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.at n=0A185863
• T(n,k)=1/128 the number of (n+2)X(k+2) binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.at n=15A185866
• T(n,k)=1/128 the number of (n+2)X(k+2) binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace.at n=20A185866
• Sum of dimension exponents of supercharacter of unipotent upper triangular matrices.at n=6A200580
• Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=2A236605
• Number of (n+1)X(3+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=1A236606
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=7A236610
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock.at n=8A236610
• Numbers for which the cube of the sum of the digits is equal to the square of the product of their digits.at n=32A241846
• G.f. satisfies A(x) = (1 + x)^3 + x*A(x)^4.at n=5A366699