1/4 the number of (n+1)X4 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences.

A209853

1/4 the number of (n+1)X4 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences.

Terms

    a(0) =1308a(1) =43091a(2) =1386131a(3) =45071990a(4) =1460712837a(5) =47417927307

External references