Number of n X 3 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

A183315

Number of n X 3 binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

Terms

    a(0) =5a(1) =13a(2) =43a(3) =124a(4) =377a(5) =1109a(6) =3305a(7) =9767a(8) =28959a(9) =85677a(10) =253693a(11) =750777a(12) =2222308a(13) =6577131a(14) =19466625a(15) =57614249a(16) =170519517a(17) =504678557a(18) =1493676557a(19) =4420766649a(20) =13083945331a(21) =38723960052a(22) =114609540289a(23) =339204648201

External references