Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
A145998
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =1a(6) =27a(7) =10a(8) =325a(9) =79a(10) =7166a(11) =1068a(12) =296998a(13) =32561a(14) =25489453a(15) =2049805a(16) =4199698432a(17) =237788014a(19) =53948164143
External references
- oeis: A145998