Number of 0..n arrays of length 7 with 0 never adjacent to n.

Terms

a(0) =2a(1) =577a(2) =8042a(3) =49835a(4) =204994a(5) =654797a(6) =1758602a(7) =4159927a(8) =8927810a(9) =17738489a(10) =33102442a(11) =58641827a(12) =99423362a(13) =162351685a(14) =256628234a(15) =394280687a(16) =590768002a(17) =865666097a(18) =1243439210a(19) =1754301979a(20) =2435177282a(21) =3330754877a(22) =4494655882