a(n) = n^5 - n^3 - 2*n^2 + 1.

Terms

a(0) =1a(1) =-1a(2) =17a(3) =199a(4) =929a(5) =2951a(6) =7489a(7) =16367a(8) =32129a(9) =58159a(10) =98801a(11) =159479a(12) =246817a(13) =368759a(14) =534689a(15) =755551a(16) =1043969a(17) =1414367a(18) =1883089a(19) =2468519a(20) =3191201a(21) =4073959a(22) =5142017a(23) =6423119a(24) =7947649a(25) =9748751a(26) =11862449a(27) =14327767a(28) =17186849a(29) =20485079