a(n) = the maximum number of lattice points touched by an origin-centered 4d-sphere with radius <= n.

A071345

a(n) = the maximum number of lattice points touched by an origin-centered 4d-sphere with radius <= n.

Terms

    a(0) =8a(1) =32a(2) =104a(3) =192a(4) =312a(5) =576a(6) =768a(7) =960a(8) =1344a(9) =1872a(10) =1920a(11) =2496a(12) =2976a(13) =3072a(14) =4608a(15) =4608a(16) =5760a(17) =5760a(18) =6912a(19) =8064a(20) =8064a(21) =9672a(22) =10368a(23) =11520a(24) =11520a(25) =14976a(26) =14976a(27) =14976a(28) =17424a(29) =17784

External references