Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111-0100 pattern in any orientation.

A146591

Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111-0100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =1a(12) =9a(13) =9a(14) =25a(15) =25a(16) =67a(17) =67a(18) =353a(19) =353a(20) =1577a(21) =1577a(22) =17635

External references