Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0010 pattern in any orientation.
A146633
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =25a(6) =53a(7) =269a(8) =1425a(9) =7687a(10) =57643a(11) =735315a(12) =7616377a(13) =142631981a(14) =2418705027a(15) =66038837775
External references
- oeis: A146633