Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0010 pattern in any orientation.
A146460
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =25a(6) =87a(7) =503a(8) =2831a(9) =25037a(10) =243793a(11) =3762955a(12) =62868913a(13) =1572482009a(14) =42577954723
External references
- oeis: A146460