474286

Appears in sequences

• Number of n X n binary matrices M (that is, real matrices with entries 0 and 1) such that M^2 is also a binary matrix.at n=5A121231
• Duplicate of A121231.at n=4A122527
• T(n,k)=Number of n X n 0..k matrices whose square is also a 0..k matrix.at n=14A213990
• Number of 5X5 0..n matrices whose square is also a 0..n matrix.at n=0A213994