Number of nX4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.

A195958

Number of nX4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.

Terms

    a(0) =1a(1) =5a(2) =16a(3) =19a(4) =25a(5) =70a(6) =105a(7) =155a(8) =332a(9) =557a(10) =1043a(11) =1904a(12) =3391a(13) =6117a(14) =11118a(15) =20903a(16) =37963a(17) =69792a(18) =127581a(19) =235413a(20) =434388a(21) =799835a(22) =1483313a(23) =2732560a(24) =5053827a(25) =9336031a(26) =17297902a(27) =32036101a(28) =59311429a(29) =109934878

External references