A174682 - cp's OEIS frontend

A174682 Positive integers which cannot be represented as half-sums (averages) of two primes with prime subscripts.

n	a(n)
1	1
2	2
3	6
4	9
5	12
6	13
7	15
8	16
9	19
10	20
11	25
12	27
13	28
14	30
15	33
16	34
17	37
18	40
19	46
20	48
21	51
22	52
23	53
24	55
25	58
26	61
27	64
28	68
29	73
30	74
31	76
32	77
33	78
34	82
35	85
36	86
37	89
38	90
39	100
40	102
41	103
42	106
43	113
44	115
45	117
46	124
47	128
48	130
49	132
50	134
51	138
52	145
53	146
54	148
55	149
56	151
57	152
58	155
59	156
60	158
61	161
62	163
63	164

[1, 2, 6, 9, 12, 13, 15, 16, 19, 20, 25, 27, 28, 30, 33, 34, 37, 40, 46, 48, 51, 52, 53, 55, 58, 61, 64, 68, 73, 74, 76, 77, 78, 82, 85, 86, 89, 90, 100, 102, 103, 106, 113, 115, 117, 124, 128, 130, 132, 134, 138, 145, 146, 148, 149, 151, 152, 155, 156, 158, 161, 163, 164]

cp's OEIS Frontend

A174682 Positive integers which cannot be represented as half-sums (averages) of two primes with prime subscripts.

Table of values

List of values

n	a(n)
1	1
2	2
3	6
4	9
5	12
6	13
7	15
8	16
9	19
10	20
11	25
12	27
13	28
14	30
15	33
16	34
17	37
18	40
19	46
20	48
21	51
22	52
23	53
24	55
25	58
26	61
27	64
28	68
29	73
30	74
31	76
32	77
33	78
34	82
35	85
36	86
37	89
38	90
39	100
40	102
41	103
42	106
43	113
44	115
45	117
46	124
47	128
48	130
49	132
50	134
51	138
52	145
53	146
54	148
55	149
56	151
57	152
58	155
59	156
60	158
61	161
62	163
63	164

n	a(n)
1	1
2	2
3	6
4	9
5	12
6	13
7	15
8	16
9	19
10	20
11	25
12	27
13	28
14	30
15	33
16	34
17	37
18	40
19	46
20	48
21	51
22	52
23	53
24	55
25	58
26	61
27	64
28	68
29	73
30	74
31	76
32	77
33	78
34	82
35	85
36	86
37	89
38	90
39	100
40	102
41	103
42	106
43	113
44	115
45	117
46	124
47	128
48	130
49	132
50	134
51	138
52	145
53	146
54	148
55	149
56	151
57	152
58	155
59	156
60	158
61	161
62	163
63	164

n	a(n)
1	1
2	2
3	6
4	9
5	12
6	13
7	15
8	16
9	19
10	20
11	25
12	27
13	28
14	30
15	33
16	34
17	37
18	40
19	46
20	48
21	51
22	52
23	53
24	55
25	58
26	61
27	64
28	68
29	73
30	74
31	76
32	77
33	78
34	82
35	85
36	86
37	89
38	90
39	100
40	102
41	103
42	106
43	113
44	115
45	117
46	124
47	128
48	130
49	132
50	134
51	138
52	145
53	146
54	148
55	149
56	151
57	152
58	155
59	156
60	158
61	161
62	163
63	164