A306581 - cp's OEIS frontend

A306581 Lexicographically earliest sequence of distinct positive terms such that the binary representations of two consecutive terms can always been concatenated in some order, without leading zero, to produce the binary representation of a prime number.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	11
8	8
9	7
10	9
11	13
12	10
13	17
14	12
15	25
16	18
17	23
18	15
19	14
20	19
21	20
22	21
23	26
24	27
25	31
26	29
27	16
28	37
29	34
30	45
31	22
32	39
33	28
34	55
35	46
36	57
37	35
38	24
39	43
40	36
41	47
42	33
43	32
44	41
45	38
46	67
47	30
48	53
49	42
50	61
51	40
52	49
53	48
54	73
55	50
56	51
57	59
58	56
59	69
60	44
61	63
62	52
63	77
64	60
65	79
66	54
67	65

[1, 2, 3, 4, 5, 6, 11, 8, 7, 9, 13, 10, 17, 12, 25, 18, 23, 15, 14, 19, 20, 21, 26, 27, 31, 29, 16, 37, 34, 45, 22, 39, 28, 55, 46, 57, 35, 24, 43, 36, 47, 33, 32, 41, 38, 67, 30, 53, 42, 61, 40, 49, 48, 73, 50, 51, 59, 56, 69, 44, 63, 52, 77, 60, 79, 54, 65]

cp's OEIS Frontend

A306581 Lexicographically earliest sequence of distinct positive terms such that the binary representations of two consecutive terms can always been concatenated in some order, without leading zero, to produce the binary representation of a prime number.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	11
8	8
9	7
10	9
11	13
12	10
13	17
14	12
15	25
16	18
17	23
18	15
19	14
20	19
21	20
22	21
23	26
24	27
25	31
26	29
27	16
28	37
29	34
30	45
31	22
32	39
33	28
34	55
35	46
36	57
37	35
38	24
39	43
40	36
41	47
42	33
43	32
44	41
45	38
46	67
47	30
48	53
49	42
50	61
51	40
52	49
53	48
54	73
55	50
56	51
57	59
58	56
59	69
60	44
61	63
62	52
63	77
64	60
65	79
66	54
67	65

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	11
8	8
9	7
10	9
11	13
12	10
13	17
14	12
15	25
16	18
17	23
18	15
19	14
20	19
21	20
22	21
23	26
24	27
25	31
26	29
27	16
28	37
29	34
30	45
31	22
32	39
33	28
34	55
35	46
36	57
37	35
38	24
39	43
40	36
41	47
42	33
43	32
44	41
45	38
46	67
47	30
48	53
49	42
50	61
51	40
52	49
53	48
54	73
55	50
56	51
57	59
58	56
59	69
60	44
61	63
62	52
63	77
64	60
65	79
66	54
67	65

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	11
8	8
9	7
10	9
11	13
12	10
13	17
14	12
15	25
16	18
17	23
18	15
19	14
20	19
21	20
22	21
23	26
24	27
25	31
26	29
27	16
28	37
29	34
30	45
31	22
32	39
33	28
34	55
35	46
36	57
37	35
38	24
39	43
40	36
41	47
42	33
43	32
44	41
45	38
46	67
47	30
48	53
49	42
50	61
51	40
52	49
53	48
54	73
55	50
56	51
57	59
58	56
59	69
60	44
61	63
62	52
63	77
64	60
65	79
66	54
67	65