221968

Appears in sequences

• Number of (n+1)X(n+1) binary arrays with every 2X2 subblock singular.at n=3A184678
• Number of (n+1) X 5 binary arrays with every 2 X 2 subblock singular.at n=3A184681
• T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock singular.at n=24A184686