Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-1000 pattern in any orientation.

A146649

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-1000 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =25a(6) =55a(7) =257a(8) =1343a(9) =7017a(10) =52361a(11) =533979a(12) =5651335a(13) =90178433a(14) =1487870527a(15) =34319557235a(16) =869941319597

External references