Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0001 pattern in any orientation.
A146665
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =25a(6) =67a(7) =401a(8) =2363a(9) =17629a(10) =144263a(11) =1829205a(12) =25576287a(13) =554261927a(14) =12075864101
External references
- oeis: A146665