Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,2,4,0 for x=0,1,2,3,4.
A197074
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,2,4,0 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =13a(2) =51a(3) =205a(4) =812a(5) =3295a(6) =13286a(7) =53418a(8) =215148a(9) =866828a(10) =3490915a(11) =14058935a(12) =56624663a(13) =228059383a(14) =918511377a(15) =3699344410a(16) =14899280605a(17) =60007424663a(18) =241682293896a(19) =973385377892
External references
- oeis: A197074