Number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.

A185799

Number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.

Terms

    a(0) =0a(1) =704a(2) =2176a(3) =30976a(4) =166272a(5) =1567936a(6) =10419200a(7) =85438016a(8) =615338112a(9) =4793908736a(10) =35590710400a(11) =272110337728

External references