2601925

Appears in sequences

• Number of n X n 0..4 arrays of sums of 2X2 subblocks of some (n+1)X(n+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=4A226987
• Number of nX5 0..4 arrays of sums of 2X2 subblocks of some (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=4A226991
• T(n,k)=Number of nXk 0..4 arrays of sums of 2X2 subblocks of some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=40A226992