Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
A146616
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =19a(8) =43a(9) =79a(10) =175a(11) =645a(12) =2171a(13) =9657a(14) =44753a(15) =231501a(16) =1238311a(17) =7694793a(18) =51485225a(19) =407164775a(20) =3411323191
External references
- oeis: A146616