2668339

Appears in sequences

• Half the number of (n+1) X 3 binary arrays with no 2 X 2 subblock containing exactly one 1.at n=7A184190
• Half the number of (n+1)X9 binary arrays with no 2X2 subblock containing exactly one 1.at n=1A184196
• T(n,k)=Half the number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing exactly one 1.at n=37A184197