Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in two by two blocks.
A145858
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in two by two blocks.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =4a(4) =6a(5) =31a(6) =37a(7) =642a(8) =380a(9) =14860a(10) =14318a(11) =905572a(12) =838039a(13) =131446789a(14) =91374201a(15) =32141426467a(16) =24653341080
External references
- oeis: A145858