471487297

Appears in sequences

• Number of n X n binary matrices containing no more than two 1's in any 2 X 2 subblock.at n=6A140314
• Number of n X n binary matrices, symmetric under horizontal and vertical reflection, with no more than 2 ones in any 2 X 2 subblock.at n=11A141504
• Number of (n+1) X 6 binary arrays with no 2 X 2 subblock containing fewer than two 1's.at n=4A184203