Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
A197404
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =4a(1) =20a(2) =60a(3) =358a(4) =1626a(5) =7232a(6) =34717a(7) =160988a(8) =748843a(9) =3514426a(10) =16448990a(11) =76889286a(12) =359867470a(13) =1684122959a(14) =7879951514a(15) =36879246800a(16) =172597946528a(17) =807735845097
External references
- oeis: A197404