A263856 - cp's OEIS frontend

A263856 Let S_n be the list of the first n primes written in binary, with least significant bits on the left, and sorted into lexicographic order; a(n) = position of n-th prime in S_n.

n	a(n)
1	1
2	2
3	2
4	4
5	4
6	3
7	2
8	6
9	9
10	5
11	11
12	4
13	3
14	11
15	14
16	6
17	13
18	9
19	11
20	17
21	3
22	20
23	14
24	5
25	2
26	9
27	23
28	20
29	12
30	4
31	31
32	17
33	5
34	23
35	12
36	32
37	17
38	22
39	32
40	15
41	26
42	14
43	42
44	2
45	11
46	37
47	29
48	46
49	27
50	14
51	9
52	48
53	6
54	40
55	2
56	43
57	22
58	51
59	18
60	12
61	43
62	17
63	39
64	56
65	14
66	32
67	45
68	6
69	50

[1, 2, 2, 4, 4, 3, 2, 6, 9, 5, 11, 4, 3, 11, 14, 6, 13, 9, 11, 17, 3, 20, 14, 5, 2, 9, 23, 20, 12, 4, 31, 17, 5, 23, 12, 32, 17, 22, 32, 15, 26, 14, 42, 2, 11, 37, 29, 46, 27, 14, 9, 48, 6, 40, 2, 43, 22, 51, 18, 12, 43, 17, 39, 56, 14, 32, 45, 6, 50]

cp's OEIS Frontend

A263856 Let S_n be the list of the first n primes written in binary, with least significant bits on the left, and sorted into lexicographic order; a(n) = position of n-th prime in S_n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	4
5	4
6	3
7	2
8	6
9	9
10	5
11	11
12	4
13	3
14	11
15	14
16	6
17	13
18	9
19	11
20	17
21	3
22	20
23	14
24	5
25	2
26	9
27	23
28	20
29	12
30	4
31	31
32	17
33	5
34	23
35	12
36	32
37	17
38	22
39	32
40	15
41	26
42	14
43	42
44	2
45	11
46	37
47	29
48	46
49	27
50	14
51	9
52	48
53	6
54	40
55	2
56	43
57	22
58	51
59	18
60	12
61	43
62	17
63	39
64	56
65	14
66	32
67	45
68	6
69	50

n	a(n)
1	1
2	2
3	2
4	4
5	4
6	3
7	2
8	6
9	9
10	5
11	11
12	4
13	3
14	11
15	14
16	6
17	13
18	9
19	11
20	17
21	3
22	20
23	14
24	5
25	2
26	9
27	23
28	20
29	12
30	4
31	31
32	17
33	5
34	23
35	12
36	32
37	17
38	22
39	32
40	15
41	26
42	14
43	42
44	2
45	11
46	37
47	29
48	46
49	27
50	14
51	9
52	48
53	6
54	40
55	2
56	43
57	22
58	51
59	18
60	12
61	43
62	17
63	39
64	56
65	14
66	32
67	45
68	6
69	50

n	a(n)
1	1
2	2
3	2
4	4
5	4
6	3
7	2
8	6
9	9
10	5
11	11
12	4
13	3
14	11
15	14
16	6
17	13
18	9
19	11
20	17
21	3
22	20
23	14
24	5
25	2
26	9
27	23
28	20
29	12
30	4
31	31
32	17
33	5
34	23
35	12
36	32
37	17
38	22
39	32
40	15
41	26
42	14
43	42
44	2
45	11
46	37
47	29
48	46
49	27
50	14
51	9
52	48
53	6
54	40
55	2
56	43
57	22
58	51
59	18
60	12
61	43
62	17
63	39
64	56
65	14
66	32
67	45
68	6
69	50