A047808 - cp's OEIS frontend

A047808 a(n) counts different values of i^2 + j^2 <= n^2 or number of distances from the origin to all integer points inside a circle of radius n.

n	a(n)
0	1
1	2
2	4
3	7
4	10
5	14
6	19
7	24
8	30
9	37
10	44
11	52
12	59
13	69
14	78
15	87
16	98
17	109
18	121
19	133
20	146
21	158
22	173
23	186
24	200
25	216
26	233
27	249
28	265
29	283
30	300
31	318
32	338
33	357
34	377
35	398
36	418
37	439
38	461
39	482
40	505
41	528
42	553
43	576
44	602
45	626
46	653
47	680
48	705
49	735
50	762
51	790
52	819
53	847
54	877
55	904

[1, 2, 4, 7, 10, 14, 19, 24, 30, 37, 44, 52, 59, 69, 78, 87, 98, 109, 121, 133, 146, 158, 173, 186, 200, 216, 233, 249, 265, 283, 300, 318, 338, 357, 377, 398, 418, 439, 461, 482, 505, 528, 553, 576, 602, 626, 653, 680, 705, 735, 762, 790, 819, 847, 877, 904]

cp's OEIS Frontend

A047808 a(n) counts different values of i^2 + j^2 <= n^2 or number of distances from the origin to all integer points inside a circle of radius n.

Table of values

List of values

n	a(n)
0	1
1	2
2	4
3	7
4	10
5	14
6	19
7	24
8	30
9	37
10	44
11	52
12	59
13	69
14	78
15	87
16	98
17	109
18	121
19	133
20	146
21	158
22	173
23	186
24	200
25	216
26	233
27	249
28	265
29	283
30	300
31	318
32	338
33	357
34	377
35	398
36	418
37	439
38	461
39	482
40	505
41	528
42	553
43	576
44	602
45	626
46	653
47	680
48	705
49	735
50	762
51	790
52	819
53	847
54	877
55	904

n	a(n)
0	1
1	2
2	4
3	7
4	10
5	14
6	19
7	24
8	30
9	37
10	44
11	52
12	59
13	69
14	78
15	87
16	98
17	109
18	121
19	133
20	146
21	158
22	173
23	186
24	200
25	216
26	233
27	249
28	265
29	283
30	300
31	318
32	338
33	357
34	377
35	398
36	418
37	439
38	461
39	482
40	505
41	528
42	553
43	576
44	602
45	626
46	653
47	680
48	705
49	735
50	762
51	790
52	819
53	847
54	877
55	904

n	a(n)
0	1
1	2
2	4
3	7
4	10
5	14
6	19
7	24
8	30
9	37
10	44
11	52
12	59
13	69
14	78
15	87
16	98
17	109
18	121
19	133
20	146
21	158
22	173
23	186
24	200
25	216
26	233
27	249
28	265
29	283
30	300
31	318
32	338
33	357
34	377
35	398
36	418
37	439
38	461
39	482
40	505
41	528
42	553
43	576
44	602
45	626
46	653
47	680
48	705
49	735
50	762
51	790
52	819
53	847
54	877
55	904