A071600 - cp's OEIS frontend

A071600 Numbers k such that k and prime(k) have the same number of 1's in their binary representation.

n	a(n)
1	1
2	3
3	13
4	19
5	21
6	23
7	25
8	30
9	44
10	45
11	47
12	57
13	60
14	61
15	71
16	77
17	98
18	99
19	101
20	103
21	107
22	108
23	110
24	118
25	121
26	125
27	158
28	159
29	178
30	179
31	184
32	186
33	187
34	188
35	209
36	215
37	218
38	221
39	237
40	244
41	246
42	247
43	248
44	249
45	251
46	279
47	287
48	312
49	334
50	335
51	346
52	350
53	359
54	361
55	362
56	365

[1, 3, 13, 19, 21, 23, 25, 30, 44, 45, 47, 57, 60, 61, 71, 77, 98, 99, 101, 103, 107, 108, 110, 118, 121, 125, 158, 159, 178, 179, 184, 186, 187, 188, 209, 215, 218, 221, 237, 244, 246, 247, 248, 249, 251, 279, 287, 312, 334, 335, 346, 350, 359, 361, 362, 365]

cp's OEIS Frontend

A071600 Numbers k such that k and prime(k) have the same number of 1's in their binary representation.

Table of values

List of values

n	a(n)
1	1
2	3
3	13
4	19
5	21
6	23
7	25
8	30
9	44
10	45
11	47
12	57
13	60
14	61
15	71
16	77
17	98
18	99
19	101
20	103
21	107
22	108
23	110
24	118
25	121
26	125
27	158
28	159
29	178
30	179
31	184
32	186
33	187
34	188
35	209
36	215
37	218
38	221
39	237
40	244
41	246
42	247
43	248
44	249
45	251
46	279
47	287
48	312
49	334
50	335
51	346
52	350
53	359
54	361
55	362
56	365

n	a(n)
1	1
2	3
3	13
4	19
5	21
6	23
7	25
8	30
9	44
10	45
11	47
12	57
13	60
14	61
15	71
16	77
17	98
18	99
19	101
20	103
21	107
22	108
23	110
24	118
25	121
26	125
27	158
28	159
29	178
30	179
31	184
32	186
33	187
34	188
35	209
36	215
37	218
38	221
39	237
40	244
41	246
42	247
43	248
44	249
45	251
46	279
47	287
48	312
49	334
50	335
51	346
52	350
53	359
54	361
55	362
56	365

n	a(n)
1	1
2	3
3	13
4	19
5	21
6	23
7	25
8	30
9	44
10	45
11	47
12	57
13	60
14	61
15	71
16	77
17	98
18	99
19	101
20	103
21	107
22	108
23	110
24	118
25	121
26	125
27	158
28	159
29	178
30	179
31	184
32	186
33	187
34	188
35	209
36	215
37	218
38	221
39	237
40	244
41	246
42	247
43	248
44	249
45	251
46	279
47	287
48	312
49	334
50	335
51	346
52	350
53	359
54	361
55	362
56	365