Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.

A207695

Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.

Terms

    a(0) =9a(1) =81a(2) =144a(3) =256a(4) =768a(5) =2304a(6) =5856a(7) =14884a(8) =42700a(9) =122500a(10) =320600a(11) =839056a(12) =2361448a(13) =6646084a(14) =17633520a(15) =46785600a(16) =130315680a(17) =362978704a(18) =970889920a(19) =2596921600a(20) =7186175360a(21) =19885512256a(22) =53475523456a(23) =143804774656a(24) =396160887744

External references