Number of n X n binary matrices, symmetric under 180 degree rotation, with rows, considered as binary numbers, in strictly increasing order.

A141049

Number of n X n binary matrices, symmetric under 180 degree rotation, with rows, considered as binary numbers, in strictly increasing order.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =32a(4) =138a(5) =4080a(6) =59524a(7) =4687776a(8) =225124336a(9) =51271450616

External references