A233998 - cp's OEIS frontend

A233998 Values of n such that numbers of the form x^2+n*y^2 for some integers x, y cannot have prime factor of 5 raised to an odd power.

n	a(n)
1	2
2	3
3	7
4	8
5	12
6	13
7	17
8	18
9	22
10	23
11	27
12	28
13	32
14	33
15	37
16	38
17	42
18	43
19	47
20	48
21	50
22	52
23	53
24	57
25	58
26	62
27	63
28	67
29	68
30	72
31	73
32	75
33	77
34	78
35	82
36	83
37	87
38	88
39	92
40	93
41	97
42	98
43	102
44	103
45	107
46	108
47	112
48	113
49	117
50	118
51	122
52	123
53	127
54	128
55	132
56	133
57	137
58	138
59	142
60	143
61	147
62	148
63	152
64	153
65	157
66	158

[2, 3, 7, 8, 12, 13, 17, 18, 22, 23, 27, 28, 32, 33, 37, 38, 42, 43, 47, 48, 50, 52, 53, 57, 58, 62, 63, 67, 68, 72, 73, 75, 77, 78, 82, 83, 87, 88, 92, 93, 97, 98, 102, 103, 107, 108, 112, 113, 117, 118, 122, 123, 127, 128, 132, 133, 137, 138, 142, 143, 147, 148, 152, 153, 157, 158]

cp's OEIS Frontend

A233998 Values of n such that numbers of the form x^2+n*y^2 for some integers x, y cannot have prime factor of 5 raised to an odd power.

Table of values

List of values

n	a(n)
1	2
2	3
3	7
4	8
5	12
6	13
7	17
8	18
9	22
10	23
11	27
12	28
13	32
14	33
15	37
16	38
17	42
18	43
19	47
20	48
21	50
22	52
23	53
24	57
25	58
26	62
27	63
28	67
29	68
30	72
31	73
32	75
33	77
34	78
35	82
36	83
37	87
38	88
39	92
40	93
41	97
42	98
43	102
44	103
45	107
46	108
47	112
48	113
49	117
50	118
51	122
52	123
53	127
54	128
55	132
56	133
57	137
58	138
59	142
60	143
61	147
62	148
63	152
64	153
65	157
66	158

n	a(n)
1	2
2	3
3	7
4	8
5	12
6	13
7	17
8	18
9	22
10	23
11	27
12	28
13	32
14	33
15	37
16	38
17	42
18	43
19	47
20	48
21	50
22	52
23	53
24	57
25	58
26	62
27	63
28	67
29	68
30	72
31	73
32	75
33	77
34	78
35	82
36	83
37	87
38	88
39	92
40	93
41	97
42	98
43	102
44	103
45	107
46	108
47	112
48	113
49	117
50	118
51	122
52	123
53	127
54	128
55	132
56	133
57	137
58	138
59	142
60	143
61	147
62	148
63	152
64	153
65	157
66	158

n	a(n)
1	2
2	3
3	7
4	8
5	12
6	13
7	17
8	18
9	22
10	23
11	27
12	28
13	32
14	33
15	37
16	38
17	42
18	43
19	47
20	48
21	50
22	52
23	53
24	57
25	58
26	62
27	63
28	67
29	68
30	72
31	73
32	75
33	77
34	78
35	82
36	83
37	87
38	88
39	92
40	93
41	97
42	98
43	102
44	103
45	107
46	108
47	112
48	113
49	117
50	118
51	122
52	123
53	127
54	128
55	132
56	133
57	137
58	138
59	142
60	143
61	147
62	148
63	152
64	153
65	157
66	158