Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0001 pattern in any orientation.
A146603
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =9a(7) =11a(8) =177a(9) =325a(10) =3375a(11) =7559a(12) =107583a(13) =279679a(14) =10392307a(15) =32537343a(16) =2182245881a(17) =8257920539a(18) =997413109357
External references
- oeis: A146603