A235489 - cp's OEIS frontend

A235489 Self-inverse and multiplicative permutation of integers: For n < 8, a(n) = n, a(8)=9 and a(9)=8, a(p_i) = p_{a(i)} for primes with index i, and for composites > 9, a(uv) = a(u) a(v).

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	8
10	10
11	11
12	12
13	13
14	14
15	15
16	18
17	17
18	16
19	23
20	20
21	21
22	22
23	19
24	27
25	25
26	26
27	24
28	28
29	29
30	30
31	31
32	36
33	33
34	34
35	35
36	32
37	37
38	46
39	39
40	45
41	41
42	42
43	43
44	44
45	40
46	38
47	47
48	54
49	49
50	50
51	51
52	52
53	61
54	48
55	55
56	63
57	69
58	58
59	59
60	60
61	53
62	62
63	56
64	81
65	65
66	66
67	83
68	68
69	57
70	70
71	71
72	72
73	73
74	74
75	75
76	92
77	77
78	78
79	79
80	90
81	64

[0, 1, 2, 3, 4, 5, 6, 7, 9, 8, 10, 11, 12, 13, 14, 15, 18, 17, 16, 23, 20, 21, 22, 19, 27, 25, 26, 24, 28, 29, 30, 31, 36, 33, 34, 35, 32, 37, 46, 39, 45, 41, 42, 43, 44, 40, 38, 47, 54, 49, 50, 51, 52, 61, 48, 55, 63, 69, 58, 59, 60, 53, 62, 56, 81, 65, 66, 83, 68, 57, 70, 71, 72, 73, 74, 75, 92, 77, 78, 79, 90, 64]

cp's OEIS Frontend

A235489 Self-inverse and multiplicative permutation of integers: For n < 8, a(n) = n, a(8)=9 and a(9)=8, a(p_i) = p_{a(i)} for primes with index i, and for composites > 9, a(uv) = a(u) a(v).

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	8
10	10
11	11
12	12
13	13
14	14
15	15
16	18
17	17
18	16
19	23
20	20
21	21
22	22
23	19
24	27
25	25
26	26
27	24
28	28
29	29
30	30
31	31
32	36
33	33
34	34
35	35
36	32
37	37
38	46
39	39
40	45
41	41
42	42
43	43
44	44
45	40
46	38
47	47
48	54
49	49
50	50
51	51
52	52
53	61
54	48
55	55
56	63
57	69
58	58
59	59
60	60
61	53
62	62
63	56
64	81
65	65
66	66
67	83
68	68
69	57
70	70
71	71
72	72
73	73
74	74
75	75
76	92
77	77
78	78
79	79
80	90
81	64

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	8
10	10
11	11
12	12
13	13
14	14
15	15
16	18
17	17
18	16
19	23
20	20
21	21
22	22
23	19
24	27
25	25
26	26
27	24
28	28
29	29
30	30
31	31
32	36
33	33
34	34
35	35
36	32
37	37
38	46
39	39
40	45
41	41
42	42
43	43
44	44
45	40
46	38
47	47
48	54
49	49
50	50
51	51
52	52
53	61
54	48
55	55
56	63
57	69
58	58
59	59
60	60
61	53
62	62
63	56
64	81
65	65
66	66
67	83
68	68
69	57
70	70
71	71
72	72
73	73
74	74
75	75
76	92
77	77
78	78
79	79
80	90
81	64

cp's OEIS Frontend

A235489 Self-inverse and multiplicative permutation of integers: For n < 8, a(n) = n, a(8)=9 and a(9)=8, a(p_i) = p_{a(i)} for primes with index i, and for composites > 9, a(u*v) = a(u) * a(v).

Table of values

List of values

A235489 Self-inverse and multiplicative permutation of integers: For n < 8, a(n) = n, a(8)=9 and a(9)=8, a(p_i) = p_{a(i)} for primes with index i, and for composites > 9, a(uv) = a(u) a(v).

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	8
10	10
11	11
12	12
13	13
14	14
15	15
16	18
17	17
18	16
19	23
20	20
21	21
22	22
23	19
24	27
25	25
26	26
27	24
28	28
29	29
30	30
31	31
32	36
33	33
34	34
35	35
36	32
37	37
38	46
39	39
40	45
41	41
42	42
43	43
44	44
45	40
46	38
47	47
48	54
49	49
50	50
51	51
52	52
53	61
54	48
55	55
56	63
57	69
58	58
59	59
60	60
61	53
62	62
63	56
64	81
65	65
66	66
67	83
68	68
69	57
70	70
71	71
72	72
73	73
74	74
75	75
76	92
77	77
78	78
79	79
80	90
81	64