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

A206088

Number of (n+1) X 3 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) =270a(1) =780a(2) =2016a(3) =5952a(4) =17976a(5) =54432a(6) =165936a(7) =504912a(8) =1538496a(9) =4687392a(10) =14278656a(11) =43507872a(12) =132544416a(13) =403832352a(14) =1230343776a(15) =3748436832a(16) =11420384736a(17) =34794057312a(18) =106006675296a(19) =322968189792a(20) =983980623456

External references