Number of length-5 0..n arrays with no repeated value equal to the previous repeated value.

Terms

a(0) =14a(1) =174a(2) =852a(3) =2780a(4) =7170a(5) =15834a(6) =31304a(7) =56952a(8) =97110a(9) =157190a(10) =243804a(11) =364884a(12) =529802a(13) =749490a(14) =1036560a(15) =1405424a(16) =1872414a(17) =2455902a(18) =3176420a(19) =4056780a(20) =5122194a(21) =6400394a(22) =7921752a(23) =9719400a(24) =11829350a(25) =14290614a(26) =17145324a(27) =20438852a(28) =24219930