a(n) = dot_product(1,2,...,n)*(5,6,...,n,1,2,3,4).

Terms

a(0) =45a(1) =67a(2) =98a(3) =140a(4) =195a(5) =265a(6) =352a(7) =458a(8) =585a(9) =735a(10) =910a(11) =1112a(12) =1343a(13) =1605a(14) =1900a(15) =2230a(16) =2597a(17) =3003a(18) =3450a(19) =3940a(20) =4475a(21) =5057a(22) =5688a(23) =6370a(24) =7105a(25) =7895a(26) =8742a(27) =9648a(28) =10615a(29) =11645