Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
A146914
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =3a(10) =5a(11) =5a(12) =9a(13) =9a(14) =19a(15) =19a(16) =57a(17) =57a(18) =217a(19) =217a(20) =857a(21) =857a(22) =3619a(23) =3619a(24) =18707a(25) =18707a(26) =117969a(27) =117969a(28) =876253a(29) =876253
External references
- oeis: A146914