Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
A301883
Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =154a(2) =823a(3) =5463a(4) =33853a(5) =223869a(6) =1454613a(7) =9620565a(8) =63336647a(9) =419113710a(10) =2770472419a(11) =18336620495a(12) =121358670826a(13) =803332031961
External references
- oeis: A301883