A047809 - cp's OEIS frontend

A047809 a(n) counts different values of i^2+j^2+k^2 <= n^2 or number of distances from the origin to all integer points inside a sphere of radius n.

n	a(n)
0	1
1	2
2	5
3	9
4	15
5	23
6	32
7	43
8	55
9	70
10	86
11	103
12	122
13	143
14	166
15	190
16	215
17	243
18	273
19	304
20	336
21	371
22	406
23	443
24	482
25	523
26	566
27	611
28	656
29	704
30	753
31	803
32	855
33	910
34	966
35	1024
36	1083
37	1145
38	1207
39	1270
40	1336
41	1404
42	1474
43	1544
44	1616
45	1690
46	1766
47	1843
48	1922
49	2004

[1, 2, 5, 9, 15, 23, 32, 43, 55, 70, 86, 103, 122, 143, 166, 190, 215, 243, 273, 304, 336, 371, 406, 443, 482, 523, 566, 611, 656, 704, 753, 803, 855, 910, 966, 1024, 1083, 1145, 1207, 1270, 1336, 1404, 1474, 1544, 1616, 1690, 1766, 1843, 1922, 2004]

cp's OEIS Frontend

A047809 a(n) counts different values of i^2+j^2+k^2 <= n^2 or number of distances from the origin to all integer points inside a sphere of radius n.

Table of values

List of values