A014202 - cp's OEIS frontend

A014202 Number of solutions to x^2 + x*y + y^2 <= n, excluding (0,0), divided by 6.

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	5
8	5
9	6
10	6
11	6
12	7
13	9
14	9
15	9
16	10
17	10
18	10
19	12
20	12
21	14
22	14
23	14
24	14
25	15
26	15
27	16
28	18
29	18
30	18
31	20
32	20
33	20
34	20
35	20
36	21
37	23
38	23
39	25
40	25
41	25
42	25
43	27
44	27
45	27
46	27
47	27
48	28
49	31
50	31
51	31
52	33
53	33
54	33
55	33
56	33
57	35
58	35
59	35

[0, 1, 1, 2, 3, 3, 3, 5, 5, 6, 6, 6, 7, 9, 9, 9, 10, 10, 10, 12, 12, 14, 14, 14, 14, 15, 15, 16, 18, 18, 18, 20, 20, 20, 20, 20, 21, 23, 23, 25, 25, 25, 25, 27, 27, 27, 27, 27, 28, 31, 31, 31, 33, 33, 33, 33, 33, 35, 35, 35]

cp's OEIS Frontend

A014202 Number of solutions to x^2 + x*y + y^2 <= n, excluding (0,0), divided by 6.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	5
8	5
9	6
10	6
11	6
12	7
13	9
14	9
15	9
16	10
17	10
18	10
19	12
20	12
21	14
22	14
23	14
24	14
25	15
26	15
27	16
28	18
29	18
30	18
31	20
32	20
33	20
34	20
35	20
36	21
37	23
38	23
39	25
40	25
41	25
42	25
43	27
44	27
45	27
46	27
47	27
48	28
49	31
50	31
51	31
52	33
53	33
54	33
55	33
56	33
57	35
58	35
59	35

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	5
8	5
9	6
10	6
11	6
12	7
13	9
14	9
15	9
16	10
17	10
18	10
19	12
20	12
21	14
22	14
23	14
24	14
25	15
26	15
27	16
28	18
29	18
30	18
31	20
32	20
33	20
34	20
35	20
36	21
37	23
38	23
39	25
40	25
41	25
42	25
43	27
44	27
45	27
46	27
47	27
48	28
49	31
50	31
51	31
52	33
53	33
54	33
55	33
56	33
57	35
58	35
59	35

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	5
8	5
9	6
10	6
11	6
12	7
13	9
14	9
15	9
16	10
17	10
18	10
19	12
20	12
21	14
22	14
23	14
24	14
25	15
26	15
27	16
28	18
29	18
30	18
31	20
32	20
33	20
34	20
35	20
36	21
37	23
38	23
39	25
40	25
41	25
42	25
43	27
44	27
45	27
46	27
47	27
48	28
49	31
50	31
51	31
52	33
53	33
54	33
55	33
56	33
57	35
58	35
59	35