Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-1010 pattern in any orientation.
A147442
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-1010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =5a(8) =22a(9) =29a(10) =66a(11) =111a(12) =398a(13) =821a(14) =3860a(15) =9205
External references
- oeis: A147442