Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A301779
Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =32a(2) =240a(3) =1808a(4) =13616a(5) =102544a(6) =772272a(7) =5816080a(8) =43801648a(9) =329875856a(10) =2484337584a(11) =18709866512a(12) =140906415920
External references
- oeis: A301779