a(n) = n^4 - 3*n^2 + 1.

Terms

a(0) =1a(1) =-1a(2) =5a(3) =55a(4) =209a(5) =551a(6) =1189a(7) =2255a(8) =3905a(9) =6319a(10) =9701a(11) =14279a(12) =20305a(13) =28055a(14) =37829a(15) =49951a(16) =64769a(17) =82655a(18) =104005a(19) =129239a(20) =158801a(21) =193159a(22) =232805a(23) =278255a(24) =330049a(25) =388751a(26) =454949a(27) =529255a(28) =612305a(29) =704759