Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.

A146193

Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 101-111-100 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) =3a(11) =3a(12) =13a(13) =13a(14) =31a(15) =31a(16) =85a(17) =85a(18) =561a(19) =561a(20) =4911a(21) =4911a(22) =35269a(23) =35269

External references