A235200 - cp's OEIS frontend

A235200 Self-inverse and multiplicative permutation of integers: a(0)=0, a(1)=1, a(2)=2, a(3)=5 and a(5)=3, a(p_i) = p_{a(i-1)+1} for primes with index i > 3, and a(u * v) = a(u) * a(v) for u, v > 0.

n	a(n)
0	0
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	11
12	20
13	7
14	26
15	15
16	16
17	31
18	50
19	43
20	12
21	65
22	22
23	23
24	40
25	9
26	14
27	125
28	52
29	101
30	30
31	17
32	32
33	55
34	62
35	39
36	100
37	37
38	86
39	35
40	24
41	73
42	130
43	19
44	44
45	75
46	46
47	103
48	80
49	169
50	18
51	155
52	28
53	53
54	250
55	33
56	104
57	215
58	202
59	59
60	60
61	131
62	34
63	325
64	64

[0, 1, 2, 5, 4, 3, 10, 13, 8, 25, 6, 11, 20, 7, 26, 15, 16, 31, 50, 43, 12, 65, 22, 23, 40, 9, 14, 125, 52, 101, 30, 17, 32, 55, 62, 39, 100, 37, 86, 35, 24, 73, 130, 19, 44, 75, 46, 103, 80, 169, 18, 155, 28, 53, 250, 33, 104, 215, 202, 59, 60, 131, 34, 325, 64]

cp's OEIS Frontend

A235200 Self-inverse and multiplicative permutation of integers: a(0)=0, a(1)=1, a(2)=2, a(3)=5 and a(5)=3, a(p_i) = p_{a(i-1)+1} for primes with index i > 3, and a(u * v) = a(u) * a(v) for u, v > 0.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	11
12	20
13	7
14	26
15	15
16	16
17	31
18	50
19	43
20	12
21	65
22	22
23	23
24	40
25	9
26	14
27	125
28	52
29	101
30	30
31	17
32	32
33	55
34	62
35	39
36	100
37	37
38	86
39	35
40	24
41	73
42	130
43	19
44	44
45	75
46	46
47	103
48	80
49	169
50	18
51	155
52	28
53	53
54	250
55	33
56	104
57	215
58	202
59	59
60	60
61	131
62	34
63	325
64	64

n	a(n)
0	0
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	11
12	20
13	7
14	26
15	15
16	16
17	31
18	50
19	43
20	12
21	65
22	22
23	23
24	40
25	9
26	14
27	125
28	52
29	101
30	30
31	17
32	32
33	55
34	62
35	39
36	100
37	37
38	86
39	35
40	24
41	73
42	130
43	19
44	44
45	75
46	46
47	103
48	80
49	169
50	18
51	155
52	28
53	53
54	250
55	33
56	104
57	215
58	202
59	59
60	60
61	131
62	34
63	325
64	64

n	a(n)
0	0
1	1
2	2
3	5
4	4
5	3
6	10
7	13
8	8
9	25
10	6
11	11
12	20
13	7
14	26
15	15
16	16
17	31
18	50
19	43
20	12
21	65
22	22
23	23
24	40
25	9
26	14
27	125
28	52
29	101
30	30
31	17
32	32
33	55
34	62
35	39
36	100
37	37
38	86
39	35
40	24
41	73
42	130
43	19
44	44
45	75
46	46
47	103
48	80
49	169
50	18
51	155
52	28
53	53
54	250
55	33
56	104
57	215
58	202
59	59
60	60
61	131
62	34
63	325
64	64