Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,0,0 for x=0,1,2,3,4.
A197532
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,0,0 for x=0,1,2,3,4.
Terms
- a(0) =4a(1) =16a(2) =56a(3) =216a(4) =868a(5) =3500a(6) =14085a(7) =56842a(8) =229706a(9) =928664a(10) =3755722a(11) =15191220a(12) =61451640a(13) =248596817a(14) =1005703793a(15) =4068662528a(16) =16460279703a(17) =66592450774a(18) =269410213656
External references
- oeis: A197532