77574

Appears in sequences

• Number of (n+1)X3 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=7A204033
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=37A204039
• Number of (n+2)X5 0..2 matrices with each 3X3 subblock idempotent.at n=17A224601