Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318041
Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =3a(2) =21a(3) =140a(4) =905a(5) =6179a(6) =42793a(7) =297043a(8) =2056698a(9) =14234986a(10) =98543469a(11) =682235511a(12) =4723208829a(13) =32699080489a(14) =226377712742
External references
- oeis: A318041