(1/8)*number of lattice points with odd indices in a cubic lattice inside a sphere around the origin with radius 2*n.

A120884

(1/8)*number of lattice points with odd indices in a cubic lattice inside a sphere around the origin with radius 2*n.

Terms

    a(0) =1a(1) =4a(2) =17a(3) =35a(4) =69a(5) =114a(6) =184a(7) =272a(8) =389a(9) =528a(10) =702a(11) =901a(12) =1166a(13) =1442a(14) =1791a(15) =2157a(16) =2584a(17) =3058a(18) =3596a(19) =4194a(20) =4878a(21) =5590a(22) =6388a(23) =7232a(24) =8219a(25) =9228a(26) =10339a(27) =11512a(28) =12776a(29) =14138

External references