A078184 - cp's OEIS frontend

A078184 Number of solutions to n^2 < x^2 + y^2 + z^2 < (n+1)^2; number of lattice points between spheres of radii n and n+1.

n	a(n)
0	0
1	20
2	60
3	128
4	228
5	380
6	440
7	684
8	860
9	1068
10	1328
11	1548
12	1940
13	2288
14	2484
15	2924
16	3300
17	3824
18	4140
19	4700
20	5240
21	5484
22	6260
23	6864
24	7340
25	8180
26	8676
27	9392
28	9804
29	10988
30	11208
31	12572
32	13100
33	13860
34	14792
35	15588
36	16604
37	17328
38	18500
39	19292

[0, 20, 60, 128, 228, 380, 440, 684, 860, 1068, 1328, 1548, 1940, 2288, 2484, 2924, 3300, 3824, 4140, 4700, 5240, 5484, 6260, 6864, 7340, 8180, 8676, 9392, 9804, 10988, 11208, 12572, 13100, 13860, 14792, 15588, 16604, 17328, 18500, 19292]

cp's OEIS Frontend

A078184 Number of solutions to n^2 < x^2 + y^2 + z^2 < (n+1)^2; number of lattice points between spheres of radii n and n+1.

Table of values

List of values