Number of (n+1) X 4 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

A206089

Number of (n+1) X 4 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

Terms

    a(0) =972a(1) =2016a(2) =4560a(3) =13344a(4) =33792a(5) =86496a(6) =240192a(7) =608256a(8) =1556928a(9) =4323456a(10) =10948608a(11) =28024704a(12) =77822208a(13) =197074944a(14) =504444672a(15) =1400799744a(16) =3547348992a(17) =9080004096a(18) =25214395392a(19) =63852281856a(20) =163440073728a(21) =453859117056

External references