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

A146379

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

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =13a(8) =25a(9) =41a(10) =95a(11) =289a(12) =1010a(13) =4113a(14) =15296a(15) =63783a(16) =305771a(17) =1708813a(18) =10377230a(19) =69118879a(20) =490255119a(21) =4001984029a(22) =36100718210a(23) =369478821921

External references