A248015 - cp's OEIS frontend

A248015 Positive numbers n such that n^2 + 1 is composite and there are no positive integers c and z such that n = c*z^2 + z + c.

n	a(n)
1	8
2	18
3	28
4	30
5	34
6	44
7	46
8	48
9	50
10	58
11	60
12	64
13	68
14	70
15	76
16	78
17	86
18	88
19	96
20	98
21	100
22	104
23	108
24	114
25	118
26	128
27	136
28	144
29	148
30	158
31	164
32	166
33	168
34	178
35	186
36	188
37	190
38	194
39	196
40	198
41	200

[8, 18, 28, 30, 34, 44, 46, 48, 50, 58, 60, 64, 68, 70, 76, 78, 86, 88, 96, 98, 100, 104, 108, 114, 118, 128, 136, 144, 148, 158, 164, 166, 168, 178, 186, 188, 190, 194, 196, 198, 200]

cp's OEIS Frontend

A248015 Positive numbers n such that n^2 + 1 is composite and there are no positive integers c and z such that n = c*z^2 + z + c.

Table of values

List of values

n	a(n)
1	8
2	18
3	28
4	30
5	34
6	44
7	46
8	48
9	50
10	58
11	60
12	64
13	68
14	70
15	76
16	78
17	86
18	88
19	96
20	98
21	100
22	104
23	108
24	114
25	118
26	128
27	136
28	144
29	148
30	158
31	164
32	166
33	168
34	178
35	186
36	188
37	190
38	194
39	196
40	198
41	200

n	a(n)
1	8
2	18
3	28
4	30
5	34
6	44
7	46
8	48
9	50
10	58
11	60
12	64
13	68
14	70
15	76
16	78
17	86
18	88
19	96
20	98
21	100
22	104
23	108
24	114
25	118
26	128
27	136
28	144
29	148
30	158
31	164
32	166
33	168
34	178
35	186
36	188
37	190
38	194
39	196
40	198
41	200

n	a(n)
1	8
2	18
3	28
4	30
5	34
6	44
7	46
8	48
9	50
10	58
11	60
12	64
13	68
14	70
15	76
16	78
17	86
18	88
19	96
20	98
21	100
22	104
23	108
24	114
25	118
26	128
27	136
28	144
29	148
30	158
31	164
32	166
33	168
34	178
35	186
36	188
37	190
38	194
39	196
40	198
41	200