Number of n X 4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to 2.

A197057

Number of n X 4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to 2.

Terms

    a(0) =1a(1) =4a(2) =10a(3) =18a(4) =28a(5) =47a(6) =93a(7) =189a(8) =357a(9) =640a(10) =1156a(11) =2162a(12) =4102a(13) =7697a(14) =14243a(15) =26307a(16) =48917a(17) =91394a(18) =170572a(19) =317326a(20) =589634a(21) =1096821a(22) =2042877a(23) =3805343a(24) =7083795a(25) =13181280a(26) =24530278a(27) =45664276a(28) =85014554a(29) =158256855

External references