273460560

Appears in sequences

• Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0.at n=5A267900
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0.at n=41A267901