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

A141048

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

Terms

    a(0) =1a(1) =2a(2) =3a(3) =6a(4) =19a(5) =104a(6) =714a(7) =10288a(8) =181480a(9) =8058336a(10) =431947824a(11) =66774883640

External references