Number of n X 2 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.

A189154

Number of n X 2 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.

Terms

    a(0) =4a(1) =16a(2) =64a(3) =225a(4) =784a(5) =2704a(6) =9216a(7) =31329a(8) =106276a(9) =360000a(10) =1218816a(11) =4124961a(12) =13957696a(13) =47224384a(14) =159769600a(15) =540516001a(16) =1828588644a(17) =6186137104a(18) =20927672896a(19) =70798034241a(20) =239508444816a(21) =810252019600

External references