145121216

Appears in sequences

• T(n,k)=Number of idempotent n X n 0..k matrices.at n=34A222821
• Number of (n+6)X(n+6) 0..2 matrices with each 7X7 subblock idempotent.at n=0A224637
• Number of (n+6)X7 0..2 matrices with each 7X7 subblock idempotent.at n=0A224638
• T(n,k) = Number of (n+6) X (k+6) 0..2 matrices with each 7 X 7 subblock idempotent.at n=0A224642