Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0011 pattern in any orientation.
A147465
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0011 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =7a(8) =19a(9) =33a(10) =57a(11) =137a(12) =389a(13) =1061a(14) =3337a(15) =12013a(16) =46721a(17) =194071a(18) =871607a(19) =4080549a(20) =21286795a(21) =118904521a(22) =740082723a(23) =4935470201a(24) =36634269329
External references
- oeis: A147465