Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either as two by three or three by two blocks.
A146153
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only either as two by three or three by two blocks.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =3a(4) =9a(5) =11a(6) =82a(7) =254a(8) =1669a(9) =6665a(10) =68316a(11) =226521a(12) =4561686a(13) =23734103a(14) =704383992a(15) =5907579541a(16) =236178663400
External references
- oeis: A146153