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

A181278

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

Terms

    a(0) =0a(1) =3a(2) =11a(3) =48a(4) =188a(5) =768a(6) =3056a(7) =12288a(8) =49088a(9) =196608a(10) =786176a(11) =3145728a(12) =12581888a(13) =50331648a(14) =201322496a(15) =805306368a(16) =3221209088a(17) =12884901888a(18) =51539542016a(19) =206158430208a(20) =824633458688

External references