Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,0,2,1 for x=0,1,2,3,4.
A197303
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,0,2,1 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =23a(2) =98a(3) =639a(4) =3181a(5) =15930a(6) =85087a(7) =450159a(8) =2373372a(9) =12475923a(10) =65599353a(11) =345356968a(12) =1818230847a(13) =9570445721a(14) =50371708666a(15) =265125975409
External references
- oeis: A197303