Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
A146395
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =19a(8) =43a(9) =103a(10) =349a(11) =1189a(12) =4335a(13) =18031a(14) =97075a(15) =543815a(16) =3556863a(17) =24384071a(18) =196142765a(19) =1671349393
External references
- oeis: A146395