a(n)=(1/120)*n^10-(1/3)*n^9+(143/24)*n^8-(373/6*n^7)+(99377/240)*n^6-(3603/2)*n^5+(119627/24)*n^4-(23833/3)*n^3+(16342/3)*n^2+((1/24)*n^8-(3/2)*n^7+(1111/48)*n^6-(391/2)*n^5+(7595/8)*n^4-2487*n^3+(8032/3)*n^2)*(-1)^n+((9/2)*n^4-78*n^3+374*n^2)*cos(Pi*n/2)+((8/3)*n^4-(128/3)*n^3+(656/3)*n^2)*cos(2*Pi*n/3)+(80/3)*n^2*cos(Pi*n/3)+。
重现性:a(n)=-3a(n-1)-5a(n-2)-5a n-20)-1069a(n-21)-1111a(n-22)-689a(n-23)+84a(n-24)+929a(n-25)+1488a(n-26)+1506a(n-27)+939a(n-28)-939a(n-30)-1506a(n-31)-1488a(n-32)-929a(n-33)-84a(n-34)+689a(n-35)+1111a(n-36)+1069a(n-37)+656a(n-38)+99a(n-39)-368a(n-40)-588a(n-41)-544a(n-42)-321a(n-44)+139a(n-45)+215a(n-46)+185a(n-47)+101a(n-48)+16a(n-49)-35a(n-50)-49a(n-51)-37a(n-52)-17a(n-53)-2a(n-54)+5a(n-55)+5a(n-56)+3a(n-57)+a(n-58)。