Number of n X 2 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
A268783
Number of n X 2 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =1a(1) =5a(2) =17a(3) =48a(4) =131a(5) =338a(6) =850a(7) =2091a(8) =5061a(9) =12095a(10) =28608a(11) =67095a(12) =156244a(13) =361652a(14) =832757a(15) =1908885a(16) =4358285a(17) =9915728a(18) =22489147a(19) =50862918a(20) =114743814a(21) =258261695a(22) =580072917a(23) =1300393467a(24) =2910078592a(25) =6501783407a(26) =14504787560a(27) =32313853992a(28) =71896385513
External references
- oeis: A268783