A217707 - cp's OEIS frontend

A217707 Numbers n such that both 4n-1 and 4n+1 are composite.

n	a(n)
1	14
2	16
3	19
4	23
5	29
6	30
7	31
8	36
9	40
10	44
11	46
12	47
13	51
14	52
15	54
16	55
17	59
18	61
19	62
20	65
21	72
22	74
23	75
24	76
25	80
26	81
27	82
28	85
29	86
30	89
31	91
32	94
33	98
34	101
35	103
36	104
37	106
38	107
39	109
40	113
41	118
42	119
43	121
44	124
45	128
46	129
47	132
48	133
49	134
50	136
51	138
52	140
53	145
54	146
55	149
56	151
57	156
58	157
59	159

[14, 16, 19, 23, 29, 30, 31, 36, 40, 44, 46, 47, 51, 52, 54, 55, 59, 61, 62, 65, 72, 74, 75, 76, 80, 81, 82, 85, 86, 89, 91, 94, 98, 101, 103, 104, 106, 107, 109, 113, 118, 119, 121, 124, 128, 129, 132, 133, 134, 136, 138, 140, 145, 146, 149, 151, 156, 157, 159]

cp's OEIS Frontend

A217707 Numbers n such that both 4n-1 and 4n+1 are composite.

Table of values

List of values

n	a(n)
1	14
2	16
3	19
4	23
5	29
6	30
7	31
8	36
9	40
10	44
11	46
12	47
13	51
14	52
15	54
16	55
17	59
18	61
19	62
20	65
21	72
22	74
23	75
24	76
25	80
26	81
27	82
28	85
29	86
30	89
31	91
32	94
33	98
34	101
35	103
36	104
37	106
38	107
39	109
40	113
41	118
42	119
43	121
44	124
45	128
46	129
47	132
48	133
49	134
50	136
51	138
52	140
53	145
54	146
55	149
56	151
57	156
58	157
59	159

n	a(n)
1	14
2	16
3	19
4	23
5	29
6	30
7	31
8	36
9	40
10	44
11	46
12	47
13	51
14	52
15	54
16	55
17	59
18	61
19	62
20	65
21	72
22	74
23	75
24	76
25	80
26	81
27	82
28	85
29	86
30	89
31	91
32	94
33	98
34	101
35	103
36	104
37	106
38	107
39	109
40	113
41	118
42	119
43	121
44	124
45	128
46	129
47	132
48	133
49	134
50	136
51	138
52	140
53	145
54	146
55	149
56	151
57	156
58	157
59	159

cp's OEIS Frontend

A217707 Numbers n such that both 4*n-1 and 4*n+1 are composite.

Table of values

List of values

A217707 Numbers n such that both 4n-1 and 4n+1 are composite.

n	a(n)
1	14
2	16
3	19
4	23
5	29
6	30
7	31
8	36
9	40
10	44
11	46
12	47
13	51
14	52
15	54
16	55
17	59
18	61
19	62
20	65
21	72
22	74
23	75
24	76
25	80
26	81
27	82
28	85
29	86
30	89
31	91
32	94
33	98
34	101
35	103
36	104
37	106
38	107
39	109
40	113
41	118
42	119
43	121
44	124
45	128
46	129
47	132
48	133
49	134
50	136
51	138
52	140
53	145
54	146
55	149
56	151
57	156
58	157
59	159