A032726 - cp's OEIS frontend

A032726 Numbers k such that k prefixed by '1' and followed by '9' is a prime.

n	a(n)
1	0
2	3
3	4
4	7
5	9
6	10
7	12
8	22
9	24
10	25
11	27
12	28
13	31
14	39
15	40
16	42
17	43
18	45
19	48
20	49
21	54
22	55
23	57
24	60
25	61
26	66
27	69
28	70
29	75
30	78
31	87
32	88
33	94
34	97
35	99
36	105
37	106
38	111
39	114
40	115
41	123
42	127
43	129
44	132
45	136
46	139
47	148
48	151
49	154
50	157
51	168
52	169
53	171
54	177
55	178
56	183
57	190
58	193
59	195
60	196
61	204

[0, 3, 4, 7, 9, 10, 12, 22, 24, 25, 27, 28, 31, 39, 40, 42, 43, 45, 48, 49, 54, 55, 57, 60, 61, 66, 69, 70, 75, 78, 87, 88, 94, 97, 99, 105, 106, 111, 114, 115, 123, 127, 129, 132, 136, 139, 148, 151, 154, 157, 168, 169, 171, 177, 178, 183, 190, 193, 195, 196, 204]

cp's OEIS Frontend

A032726 Numbers k such that k prefixed by '1' and followed by '9' is a prime.

Table of values

List of values

n	a(n)
1	0
2	3
3	4
4	7
5	9
6	10
7	12
8	22
9	24
10	25
11	27
12	28
13	31
14	39
15	40
16	42
17	43
18	45
19	48
20	49
21	54
22	55
23	57
24	60
25	61
26	66
27	69
28	70
29	75
30	78
31	87
32	88
33	94
34	97
35	99
36	105
37	106
38	111
39	114
40	115
41	123
42	127
43	129
44	132
45	136
46	139
47	148
48	151
49	154
50	157
51	168
52	169
53	171
54	177
55	178
56	183
57	190
58	193
59	195
60	196
61	204

n	a(n)
1	0
2	3
3	4
4	7
5	9
6	10
7	12
8	22
9	24
10	25
11	27
12	28
13	31
14	39
15	40
16	42
17	43
18	45
19	48
20	49
21	54
22	55
23	57
24	60
25	61
26	66
27	69
28	70
29	75
30	78
31	87
32	88
33	94
34	97
35	99
36	105
37	106
38	111
39	114
40	115
41	123
42	127
43	129
44	132
45	136
46	139
47	148
48	151
49	154
50	157
51	168
52	169
53	171
54	177
55	178
56	183
57	190
58	193
59	195
60	196
61	204

n	a(n)
1	0
2	3
3	4
4	7
5	9
6	10
7	12
8	22
9	24
10	25
11	27
12	28
13	31
14	39
15	40
16	42
17	43
18	45
19	48
20	49
21	54
22	55
23	57
24	60
25	61
26	66
27	69
28	70
29	75
30	78
31	87
32	88
33	94
34	97
35	99
36	105
37	106
38	111
39	114
40	115
41	123
42	127
43	129
44	132
45	136
46	139
47	148
48	151
49	154
50	157
51	168
52	169
53	171
54	177
55	178
56	183
57	190
58	193
59	195
60	196
61	204