Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

A298449

Number of nX3 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =4a(2) =0a(3) =11a(4) =26a(5) =46a(6) =204a(7) =696a(8) =1493a(9) =5880a(10) =18994a(11) =49941a(12) =174020a(13) =552946a(14) =1590917a(15) =5237693a(16) =16486804a(17) =49511202a(18) =158599036a(19) =497008665a(20) =1523240497a(21) =4815373712a(22) =15059431049a(23) =46604564297a(24) =146391271270a(25) =457401829113

External references