Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.

A146830

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =25a(7) =97a(8) =477a(9) =2077a(10) =8985a(11) =74677a(12) =698825a(13) =7828097a(14) =101646585a(15) =1842811427

External references