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

Terms

a(0) =6a(1) =60a(2) =330a(3) =1224a(4) =3510a(5) =8436a(6) =17850a(7) =34320a(8) =61254a(9) =103020a(10) =165066a(11) =254040a(12) =377910a(13) =546084a(14) =769530a(15) =1060896a(16) =1434630a(17) =1907100a(18) =2496714a(19) =3224040a(20) =4111926a(21) =5185620a(22) =6472890a(23) =8004144a(24) =9812550a(25) =11934156a(26) =14408010a(27) =17276280a(28) =20584374a(29) =24381060