Number of nX5 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.

A197051

Number of nX5 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.

Terms

    a(0) =4a(1) =10a(2) =38a(3) =108a(4) =358a(5) =1132a(6) =3580a(7) =11382a(8) =36270a(9) =114992a(10) =365628a(11) =1162290a(12) =3692624a(13) =11733828a(14) =37293892a(15) =118504546a(16) =376583590a(17) =1196750110a(18) =3803034578a(19) =12085297922a(20) =38405269512a(21) =122045123484a(22) =387837623386

External references