Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,2,2 for x=0,1,2,3,4.
A197557
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,2,2 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =23a(2) =106a(3) =927a(4) =4055a(5) =23710a(6) =139477a(7) =791905a(8) =4560098a(9) =25954025a(10) =148624999a(11) =851071784a(12) =4868658595a(13) =27861309921a(14) =159413524406a(15) =912205738931
External references
- oeis: A197557