Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318012
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =97a(2) =508a(3) =3062a(4) =17703a(5) =103633a(6) =603215a(7) =3512154a(8) =20446744a(9) =119050218a(10) =693180972a(11) =4036155290a(12) =23501168666a(13) =136839336291a(14) =796768793476
External references
- oeis: A318012