Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation.
A146245
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =3a(8) =5a(9) =5a(10) =11a(11) =11a(12) =29a(13) =29a(14) =171a(15) =171a(16) =783a(17) =783a(18) =4399a(19) =4399a(20) =33371a(21) =33371a(22) =348951a(23) =348951a(24) =4490023a(25) =4490023a(26) =67743969a(27) =67743969a(28) =1262306965a(29) =1262306965
External references
- oeis: A146245