264100

Appears in sequences

• Number of (n+5)X9 0..2 matrices with each 6X6 subblock idempotent.at n=6A224632
• Number of (n+5)X12 0..2 matrices with each 6X6 subblock idempotent.at n=3A224635
• Triangle read by rows, with T(n,k) giving the number of n X n Boolean matrices with exactly k ones having at least one zero row and at least one zero column.at n=43A392483