A364807 - cp's OEIS frontend

A364807 Numbers k such that abs(k - Sum_{m=2..k} pi(prime(k)/m)) is a prime number, where pi(k) is number of primes <= k.

n	a(n)
0	2
1	3
2	5
3	6
4	8
5	9
6	18
7	19
8	21
9	26
10	29
11	34
12	48
13	50
14	56
15	63
16	69
17	79
18	84
19	87
20	95
21	97
22	99
23	101
24	110
25	111
26	132
27	134
28	139
29	149
30	151
31	157
32	160
33	163
34	164
35	168
36	171
37	187
38	201
39	204
40	209
41	220
42	222
43	226
44	227
45	231
46	244
47	250
48	256
49	258
50	268
51	276
52	282
53	290
54	292
55	294
56	296
57	306

[2, 3, 5, 6, 8, 9, 18, 19, 21, 26, 29, 34, 48, 50, 56, 63, 69, 79, 84, 87, 95, 97, 99, 101, 110, 111, 132, 134, 139, 149, 151, 157, 160, 163, 164, 168, 171, 187, 201, 204, 209, 220, 222, 226, 227, 231, 244, 250, 256, 258, 268, 276, 282, 290, 292, 294, 296, 306]

cp's OEIS Frontend

A364807 Numbers k such that abs(k - Sum_{m=2..k} pi(prime(k)/m)) is a prime number, where pi(k) is number of primes <= k.

Table of values

List of values

n	a(n)
0	2
1	3
2	5
3	6
4	8
5	9
6	18
7	19
8	21
9	26
10	29
11	34
12	48
13	50
14	56
15	63
16	69
17	79
18	84
19	87
20	95
21	97
22	99
23	101
24	110
25	111
26	132
27	134
28	139
29	149
30	151
31	157
32	160
33	163
34	164
35	168
36	171
37	187
38	201
39	204
40	209
41	220
42	222
43	226
44	227
45	231
46	244
47	250
48	256
49	258
50	268
51	276
52	282
53	290
54	292
55	294
56	296
57	306

n	a(n)
0	2
1	3
2	5
3	6
4	8
5	9
6	18
7	19
8	21
9	26
10	29
11	34
12	48
13	50
14	56
15	63
16	69
17	79
18	84
19	87
20	95
21	97
22	99
23	101
24	110
25	111
26	132
27	134
28	139
29	149
30	151
31	157
32	160
33	163
34	164
35	168
36	171
37	187
38	201
39	204
40	209
41	220
42	222
43	226
44	227
45	231
46	244
47	250
48	256
49	258
50	268
51	276
52	282
53	290
54	292
55	294
56	296
57	306

n	a(n)
0	2
1	3
2	5
3	6
4	8
5	9
6	18
7	19
8	21
9	26
10	29
11	34
12	48
13	50
14	56
15	63
16	69
17	79
18	84
19	87
20	95
21	97
22	99
23	101
24	110
25	111
26	132
27	134
28	139
29	149
30	151
31	157
32	160
33	163
34	164
35	168
36	171
37	187
38	201
39	204
40	209
41	220
42	222
43	226
44	227
45	231
46	244
47	250
48	256
49	258
50	268
51	276
52	282
53	290
54	292
55	294
56	296
57	306