6468501

Appears in sequences

• Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 2 ones in any 2 X 2 subblock.at n=7A141503
• Number of (n+1)X4 binary arrays with no 2X2 subblock containing fewer than two 1s.at n=5A184201
• Number of (n+1)X7 binary arrays with no 2X2 subblock containing fewer than two 1s.at n=2A184204
• T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s.at n=30A184207
• T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s.at n=33A184207