a(n) = n^4 - 3*n^3 + 9*n^2 - 7*n + 5 (n>=1).

Terms

a(0) =5a(1) =19a(2) =65a(3) =185a(4) =445a(5) =935a(6) =1769a(7) =3085a(8) =5045a(9) =7835a(10) =11665a(11) =16769a(12) =23405a(13) =31855a(14) =42425a(15) =55445a(16) =71269a(17) =90275a(18) =112865a(19) =139465a(20) =170525a(21) =206519a(22) =247945a(23) =295325a(24) =349205a(25) =410155a(26) =478769a(27) =555665a(28) =641485a(29) =736895