Number of nX6 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318543

Number of nX6 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =13a(1) =15a(2) =52a(3) =207a(4) =784a(5) =2905a(6) =10496a(7) =38721a(8) =144148a(9) =531780a(10) =1960675a(11) =7241505a(12) =26745797a(13) =98766587a(14) =364682042a(15) =1346615672a(16) =4972655637a(17) =18362061797a(18) =67803976370a(19) =250374735252a(20) =924538580895

External references