2185738

Appears in sequences

• Number of idempotent n X n (0,1) matrices over the reals.at n=7A086922
• T(n,k)=Number of idempotent n X n 0..k matrices.at n=27A222821
• Number of (n+6)X(n+6) 0..1 matrices with each 7X7 subblock idempotent.at n=0A224580
• Number of (n+6)X7 0..1 matrices with each 7X7 subblock idempotent.at n=0A224581
• T(n,k)=Number of (n+6)X(k+6) 0..1 matrices with each 7X7 subblock idempotent.at n=0A224588