Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,2,1,3 for x=0,1,2,3,4.
A196713
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,2,1,3 for x=0,1,2,3,4.
Terms
- a(0) =4a(1) =14a(2) =40a(3) =171a(4) =543a(5) =1984a(6) =7368a(7) =25698a(8) =91687a(9) =332017a(10) =1186007a(11) =4235449a(12) =15208172a(13) =54482712a(14) =194977275a(15) =698710198a(16) =2503440997a(17) =8965814332a(18) =32118124605a(19) =115063138815a(20) =412164687036
External references
- oeis: A196713