Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111 pattern in any orientation.
A146576
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =17a(8) =45a(9) =73a(10) =207a(11) =751a(12) =2857a(13) =11091a(14) =59153a(15) =255007a(16) =1772283a(17) =9573705a(18) =76401883a(19) =527044113a(20) =5085713425a(21) =43721092953
External references
- oeis: A146576