Number of nX6 0..1 arrays with every element unequal to 0, 1 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317771

Number of nX6 0..1 arrays with every element unequal to 0, 1 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =13a(1) =18a(2) =28a(3) =23a(4) =30a(5) =40a(6) =54a(7) =82a(8) =115a(9) =185a(10) =266a(11) =425a(12) =649a(13) =1028a(14) =1588a(15) =2487a(16) =3908a(17) =6096a(18) =9677a(19) =15103a(20) =24079a(21) =37679a(22) =60164a(23) =94986a(24) =151370a(25) =239771a(26) =381764a(27) =606952a(28) =964659a(29) =1536894

External references