Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0101 pattern in any orientation.
A147180
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =17a(9) =17a(10) =53a(11) =53a(12) =329a(13) =329a(14) =3195a(15) =3195a(16) =60697a(17) =60697a(18) =1822001a(19) =1822001a(20) =62512113a(21) =62512113
External references
- oeis: A147180