A186689 - cp's OEIS frontend

A186689 Numbers n such that n^4 + 1 is a semiprime.

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	13
9	14
10	17
11	18
12	21
13	22
14	23
15	26
16	29
17	30
18	32
19	35
20	36
21	38
22	39
23	40
24	42
25	50
26	52
27	57
28	58
29	61
30	62
31	65
32	68
33	71
34	72
35	73
36	78
37	81
38	84
39	86
40	92
41	94
42	98
43	100
44	102
45	103
46	105
47	108
48	112
49	113
50	114
51	115
52	116
53	119
54	120
55	122
56	124
57	128
58	129
59	130
60	138
61	146
62	148
63	152
64	153
65	158

[3, 5, 7, 8, 10, 11, 12, 13, 14, 17, 18, 21, 22, 23, 26, 29, 30, 32, 35, 36, 38, 39, 40, 42, 50, 52, 57, 58, 61, 62, 65, 68, 71, 72, 73, 78, 81, 84, 86, 92, 94, 98, 100, 102, 103, 105, 108, 112, 113, 114, 115, 116, 119, 120, 122, 124, 128, 129, 130, 138, 146, 148, 152, 153, 158]

cp's OEIS Frontend

A186689 Numbers n such that n^4 + 1 is a semiprime.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	13
9	14
10	17
11	18
12	21
13	22
14	23
15	26
16	29
17	30
18	32
19	35
20	36
21	38
22	39
23	40
24	42
25	50
26	52
27	57
28	58
29	61
30	62
31	65
32	68
33	71
34	72
35	73
36	78
37	81
38	84
39	86
40	92
41	94
42	98
43	100
44	102
45	103
46	105
47	108
48	112
49	113
50	114
51	115
52	116
53	119
54	120
55	122
56	124
57	128
58	129
59	130
60	138
61	146
62	148
63	152
64	153
65	158

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	13
9	14
10	17
11	18
12	21
13	22
14	23
15	26
16	29
17	30
18	32
19	35
20	36
21	38
22	39
23	40
24	42
25	50
26	52
27	57
28	58
29	61
30	62
31	65
32	68
33	71
34	72
35	73
36	78
37	81
38	84
39	86
40	92
41	94
42	98
43	100
44	102
45	103
46	105
47	108
48	112
49	113
50	114
51	115
52	116
53	119
54	120
55	122
56	124
57	128
58	129
59	130
60	138
61	146
62	148
63	152
64	153
65	158

n	a(n)
1	3
2	5
3	7
4	8
5	10
6	11
7	12
8	13
9	14
10	17
11	18
12	21
13	22
14	23
15	26
16	29
17	30
18	32
19	35
20	36
21	38
22	39
23	40
24	42
25	50
26	52
27	57
28	58
29	61
30	62
31	65
32	68
33	71
34	72
35	73
36	78
37	81
38	84
39	86
40	92
41	94
42	98
43	100
44	102
45	103
46	105
47	108
48	112
49	113
50	114
51	115
52	116
53	119
54	120
55	122
56	124
57	128
58	129
59	130
60	138
61	146
62	148
63	152
64	153
65	158