Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317692

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =9a(2) =14a(3) =33a(4) =92a(5) =220a(6) =593a(7) =1787a(8) =5401a(9) =16954a(10) =55199a(11) =182686a(12) =613262a(13) =2081449a(14) =7111645a(15) =24412407a(16) =84069938a(17) =290115461a(18) =1002577520a(19) =3467926870a(20) =12002906321a(21) =41560738593a(22) =143945514141a(23) =498643272858

External references