A253046 - cp's OEIS frontend

A253046 An involution of the natural numbers: if n = 2p_i then replace n with 3p_{i+1}, and conversely if n = 3p_i then replace n with 2p_{i-1}, where p_i denotes the i-th prime.

n	a(n)
1	1
2	2
3	3
4	9
5	5
6	15
7	7
8	8
9	4
10	21
11	11
12	12
13	13
14	33
15	6
16	16
17	17
18	18
19	19
20	20
21	10
22	39
23	23
24	24
25	25
26	51
27	27
28	28
29	29
30	30
31	31
32	32
33	14
34	57
35	35
36	36
37	37
38	69
39	22
40	40
41	41
42	42
43	43
44	44
45	45
46	87
47	47
48	48
49	49
50	50
51	26
52	52
53	53
54	54
55	55
56	56
57	34
58	93
59	59
60	60
61	61
62	111
63	63
64	64
65	65
66	66
67	67

[1, 2, 3, 9, 5, 15, 7, 8, 4, 21, 11, 12, 13, 33, 6, 16, 17, 18, 19, 20, 10, 39, 23, 24, 25, 51, 27, 28, 29, 30, 31, 32, 14, 57, 35, 36, 37, 69, 22, 40, 41, 42, 43, 44, 45, 87, 47, 48, 49, 50, 26, 52, 53, 54, 55, 56, 34, 93, 59, 60, 61, 111, 63, 64, 65, 66, 67]

cp's OEIS Frontend

A253046 An involution of the natural numbers: if n = 2p_i then replace n with 3p_{i+1}, and conversely if n = 3p_i then replace n with 2p_{i-1}, where p_i denotes the i-th prime.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	9
5	5
6	15
7	7
8	8
9	4
10	21
11	11
12	12
13	13
14	33
15	6
16	16
17	17
18	18
19	19
20	20
21	10
22	39
23	23
24	24
25	25
26	51
27	27
28	28
29	29
30	30
31	31
32	32
33	14
34	57
35	35
36	36
37	37
38	69
39	22
40	40
41	41
42	42
43	43
44	44
45	45
46	87
47	47
48	48
49	49
50	50
51	26
52	52
53	53
54	54
55	55
56	56
57	34
58	93
59	59
60	60
61	61
62	111
63	63
64	64
65	65
66	66
67	67

n	a(n)
1	1
2	2
3	3
4	9
5	5
6	15
7	7
8	8
9	4
10	21
11	11
12	12
13	13
14	33
15	6
16	16
17	17
18	18
19	19
20	20
21	10
22	39
23	23
24	24
25	25
26	51
27	27
28	28
29	29
30	30
31	31
32	32
33	14
34	57
35	35
36	36
37	37
38	69
39	22
40	40
41	41
42	42
43	43
44	44
45	45
46	87
47	47
48	48
49	49
50	50
51	26
52	52
53	53
54	54
55	55
56	56
57	34
58	93
59	59
60	60
61	61
62	111
63	63
64	64
65	65
66	66
67	67

cp's OEIS Frontend

A253046 An involution of the natural numbers: if n = 2*p_i then replace n with 3*p_{i+1}, and conversely if n = 3*p_i then replace n with 2*p_{i-1}, where p_i denotes the i-th prime.

Table of values

List of values

A253046 An involution of the natural numbers: if n = 2p_i then replace n with 3p_{i+1}, and conversely if n = 3p_i then replace n with 2p_{i-1}, where p_i denotes the i-th prime.

n	a(n)
1	1
2	2
3	3
4	9
5	5
6	15
7	7
8	8
9	4
10	21
11	11
12	12
13	13
14	33
15	6
16	16
17	17
18	18
19	19
20	20
21	10
22	39
23	23
24	24
25	25
26	51
27	27
28	28
29	29
30	30
31	31
32	32
33	14
34	57
35	35
36	36
37	37
38	69
39	22
40	40
41	41
42	42
43	43
44	44
45	45
46	87
47	47
48	48
49	49
50	50
51	26
52	52
53	53
54	54
55	55
56	56
57	34
58	93
59	59
60	60
61	61
62	111
63	63
64	64
65	65
66	66
67	67