Number of 4 X n binary matrices M with rows in strictly increasing order and rows of M*transpose(M) (mod 2) in strictly increasing order.

A181272

Number of 4 X n binary matrices M with rows in strictly increasing order and rows of M*transpose(M) (mod 2) in strictly increasing order.

Terms

    a(0) =0a(1) =0a(2) =4a(3) =111a(4) =1793a(5) =32124a(6) =513260a(7) =8397376a(8) =133979600a(9) =2151884352a(10) =34376925632a(11) =550298217984

External references