114142368

Appears in sequences

• Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 3 ones in any 2 X 2 subblock.at n=7A141509
• Number of n X 4 binary matrices with no 2 X 2 block having four 1's.at n=6A181247
• Number of n X 7 binary matrices with no 2 X 2 block having four 1's.at n=3A181250