25402

Appears in sequences

• Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=3A278548
• Number of nX4 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=1A278550
• T(n,k)=Number of nXk 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=11A278553
• T(n,k)=Number of nXk 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=13A278553
• a(n) = Sum_{k=0..floor(2*n/5)} (k+1) * binomial(k,2*n-5*k).at n=36A392268
• a(n) = Sum_{k=0..floor(3*n/5)} (k+1) * binomial(k,3*n-5*k).at n=24A392311