A307109 - cp's OEIS frontend

A307109 Number of integer solutions to x^2 + x*y + y^2 <= n excluding (0,0), divided by 2.

n	a(n)
1	1
2	1
3	4
4	5
5	5
6	5
7	11
8	11
9	12
10	12
11	12
12	15
13	21
14	21
15	21
16	22
17	22
18	22
19	28
20	28
21	34
22	34
23	34
24	34
25	35
26	35
27	38
28	44
29	44
30	44
31	50
32	50
33	50
34	50
35	50
36	51
37	57
38	57
39	63
40	63
41	63
42	63
43	69
44	69
45	69
46	69
47	69
48	72
49	79
50	79
51	79
52	85
53	85
54	85
55	85
56	85
57	91
58	91
59	91
60	91
61	97
62	97
63	103
64	104
65	104
66	104

[1, 1, 4, 5, 5, 5, 11, 11, 12, 12, 12, 15, 21, 21, 21, 22, 22, 22, 28, 28, 34, 34, 34, 34, 35, 35, 38, 44, 44, 44, 50, 50, 50, 50, 50, 51, 57, 57, 63, 63, 63, 63, 69, 69, 69, 69, 69, 72, 79, 79, 79, 85, 85, 85, 85, 85, 91, 91, 91, 91, 97, 97, 103, 104, 104, 104]

cp's OEIS Frontend

A307109 Number of integer solutions to x^2 + x*y + y^2 <= n excluding (0,0), divided by 2.

Table of values

List of values

n	a(n)
1	1
2	1
3	4
4	5
5	5
6	5
7	11
8	11
9	12
10	12
11	12
12	15
13	21
14	21
15	21
16	22
17	22
18	22
19	28
20	28
21	34
22	34
23	34
24	34
25	35
26	35
27	38
28	44
29	44
30	44
31	50
32	50
33	50
34	50
35	50
36	51
37	57
38	57
39	63
40	63
41	63
42	63
43	69
44	69
45	69
46	69
47	69
48	72
49	79
50	79
51	79
52	85
53	85
54	85
55	85
56	85
57	91
58	91
59	91
60	91
61	97
62	97
63	103
64	104
65	104
66	104

n	a(n)
1	1
2	1
3	4
4	5
5	5
6	5
7	11
8	11
9	12
10	12
11	12
12	15
13	21
14	21
15	21
16	22
17	22
18	22
19	28
20	28
21	34
22	34
23	34
24	34
25	35
26	35
27	38
28	44
29	44
30	44
31	50
32	50
33	50
34	50
35	50
36	51
37	57
38	57
39	63
40	63
41	63
42	63
43	69
44	69
45	69
46	69
47	69
48	72
49	79
50	79
51	79
52	85
53	85
54	85
55	85
56	85
57	91
58	91
59	91
60	91
61	97
62	97
63	103
64	104
65	104
66	104

n	a(n)
1	1
2	1
3	4
4	5
5	5
6	5
7	11
8	11
9	12
10	12
11	12
12	15
13	21
14	21
15	21
16	22
17	22
18	22
19	28
20	28
21	34
22	34
23	34
24	34
25	35
26	35
27	38
28	44
29	44
30	44
31	50
32	50
33	50
34	50
35	50
36	51
37	57
38	57
39	63
40	63
41	63
42	63
43	69
44	69
45	69
46	69
47	69
48	72
49	79
50	79
51	79
52	85
53	85
54	85
55	85
56	85
57	91
58	91
59	91
60	91
61	97
62	97
63	103
64	104
65	104
66	104