Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-1111-0110 pattern in any orientation.

A146924

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-1111-0110 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =13a(7) =32a(8) =116a(9) =329a(10) =1343a(11) =7578a(12) =43263a(13) =292424a(14) =2337772a(15) =20731810a(16) =226646472a(17) =2872512529a(18) =41869404152a(19) =707811350778

External references