A134407 - cp's OEIS frontend

A134407 Numbers n such that n^2 + 1 is composite.

n	a(n)
1	3
2	5
3	7
4	8
5	9
6	11
7	12
8	13
9	15
10	17
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	50
39	51
40	52
41	53
42	55
43	57
44	58
45	59
46	60
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	70
56	71
57	72
58	73
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	82
67	83
68	85
69	86
70	87
71	88

[3, 5, 7, 8, 9, 11, 12, 13, 15, 17, 18, 19, 21, 22, 23, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88]

cp's OEIS Frontend

A134407 Numbers n such that n^2 + 1 is composite.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	8
5	9
6	11
7	12
8	13
9	15
10	17
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	50
39	51
40	52
41	53
42	55
43	57
44	58
45	59
46	60
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	70
56	71
57	72
58	73
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	82
67	83
68	85
69	86
70	87
71	88

n	a(n)
1	3
2	5
3	7
4	8
5	9
6	11
7	12
8	13
9	15
10	17
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	50
39	51
40	52
41	53
42	55
43	57
44	58
45	59
46	60
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	70
56	71
57	72
58	73
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	82
67	83
68	85
69	86
70	87
71	88

n	a(n)
1	3
2	5
3	7
4	8
5	9
6	11
7	12
8	13
9	15
10	17
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	50
39	51
40	52
41	53
42	55
43	57
44	58
45	59
46	60
47	61
48	62
49	63
50	64
51	65
52	67
53	68
54	69
55	70
56	71
57	72
58	73
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	82
67	83
68	85
69	86
70	87
71	88