Number of points in Z^8 of norm <= n.

Terms

a(0) =1a(1) =17a(2) =1713a(3) =33809a(4) =306049a(5) =1733537a(6) =7259297a(7) =24499121a(8) =70554353a(9) =179773681a(10) =415055025a(11) =886597537a(12) =1773617697a(13) =3355533537a(14) =6058457297a(15) =10510672945a(16) =17588781393a(17) =28537047057a(18) =45040906785a(19) =69369596001a(20) =104503770913