A245704 - cp's OEIS frontend

A245704 Permutation of natural numbers: a(1) = 1, a(A014580(n)) = A000040(a(n)), a(A091242(n)) = A002808(a(n)), where A000040(n) = n-th prime, A002808(n) = n-th composite number, and A014580(n) and A091242(n) are binary codes for n-th irreducible and n-th reducible polynomial over GF(2), respectively.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	9
9	12
10	15
11	7
12	10
13	13
14	16
15	21
16	25
17	14
18	18
19	19
20	22
21	26
22	33
23	38
24	24
25	11
26	28
27	30
28	34
29	39
30	49
31	23
32	55
33	36
34	20
35	42
36	45
37	37
38	50
39	56
40	69
41	47
42	35
43	77
44	52
45	32
46	60
47	17
48	64
49	54
50	70
51	78
52	94
53	66
54	51
55	29
56	105
57	74
58	48
59	41
60	84
61	53
62	27
63	88
64	76
65	95
66	106
67	73
68	125
69	91
70	72
71	44
72	140
73	97
74	100
75	68
76	58
77	115
78	75
79	40

[1, 2, 3, 4, 6, 8, 5, 9, 12, 15, 7, 10, 13, 16, 21, 25, 14, 18, 19, 22, 26, 33, 38, 24, 11, 28, 30, 34, 39, 49, 23, 55, 36, 20, 42, 45, 37, 50, 56, 69, 47, 35, 77, 52, 32, 60, 17, 64, 54, 70, 78, 94, 66, 51, 29, 105, 74, 48, 41, 84, 53, 27, 88, 76, 95, 106, 73, 125, 91, 72, 44, 140, 97, 100, 68, 58, 115, 75, 40]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	9
9	12
10	15
11	7
12	10
13	13
14	16
15	21
16	25
17	14
18	18
19	19
20	22
21	26
22	33
23	38
24	24
25	11
26	28
27	30
28	34
29	39
30	49
31	23
32	55
33	36
34	20
35	42
36	45
37	37
38	50
39	56
40	69
41	47
42	35
43	77
44	52
45	32
46	60
47	17
48	64
49	54
50	70
51	78
52	94
53	66
54	51
55	29
56	105
57	74
58	48
59	41
60	84
61	53
62	27
63	88
64	76
65	95
66	106
67	73
68	125
69	91
70	72
71	44
72	140
73	97
74	100
75	68
76	58
77	115
78	75
79	40

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	9
9	12
10	15
11	7
12	10
13	13
14	16
15	21
16	25
17	14
18	18
19	19
20	22
21	26
22	33
23	38
24	24
25	11
26	28
27	30
28	34
29	39
30	49
31	23
32	55
33	36
34	20
35	42
36	45
37	37
38	50
39	56
40	69
41	47
42	35
43	77
44	52
45	32
46	60
47	17
48	64
49	54
50	70
51	78
52	94
53	66
54	51
55	29
56	105
57	74
58	48
59	41
60	84
61	53
62	27
63	88
64	76
65	95
66	106
67	73
68	125
69	91
70	72
71	44
72	140
73	97
74	100
75	68
76	58
77	115
78	75
79	40

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	5
8	9
9	12
10	15
11	7
12	10
13	13
14	16
15	21
16	25
17	14
18	18
19	19
20	22
21	26
22	33
23	38
24	24
25	11
26	28
27	30
28	34
29	39
30	49
31	23
32	55
33	36
34	20
35	42
36	45
37	37
38	50
39	56
40	69
41	47
42	35
43	77
44	52
45	32
46	60
47	17
48	64
49	54
50	70
51	78
52	94
53	66
54	51
55	29
56	105
57	74
58	48
59	41
60	84
61	53
62	27
63	88
64	76
65	95
66	106
67	73
68	125
69	91
70	72
71	44
72	140
73	97
74	100
75	68
76	58
77	115
78	75
79	40