A246375 - cp's OEIS frontend

A246375 Permutation of natural numbers: a(1) = 1, a(2n) = 2*a(n), a(2n+1) = A003961(1+a(n)). [Where A003961(n) shifts the prime factorization of n one step towards larger primes].

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	7
10	10
11	15
12	12
13	11
14	18
15	21
16	16
17	25
18	14
19	27
20	20
21	13
22	30
23	81
24	24
25	17
26	22
27	45
28	36
29	23
30	42
31	39
32	32
33	19
34	50
35	51
36	28
37	35
38	54
39	99
40	40
41	55
42	26
43	33
44	60
45	37
46	162
47	129
48	48
49	49
50	34
51	75
52	44
53	29
54	90
55	87
56	72
57	41
58	46
59	135
60	84
61	47
62	78
63	189
64	64
65	65
66	38
67	63
68	100
69	95
70	102
71	153
72	56
73	31
74	70

[1, 2, 3, 4, 5, 6, 9, 8, 7, 10, 15, 12, 11, 18, 21, 16, 25, 14, 27, 20, 13, 30, 81, 24, 17, 22, 45, 36, 23, 42, 39, 32, 19, 50, 51, 28, 35, 54, 99, 40, 55, 26, 33, 60, 37, 162, 129, 48, 49, 34, 75, 44, 29, 90, 87, 72, 41, 46, 135, 84, 47, 78, 189, 64, 65, 38, 63, 100, 95, 102, 153, 56, 31, 70]

cp's OEIS Frontend

A246375 Permutation of natural numbers: a(1) = 1, a(2n) = 2*a(n), a(2n+1) = A003961(1+a(n)). [Where A003961(n) shifts the prime factorization of n one step towards larger primes].

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	7
10	10
11	15
12	12
13	11
14	18
15	21
16	16
17	25
18	14
19	27
20	20
21	13
22	30
23	81
24	24
25	17
26	22
27	45
28	36
29	23
30	42
31	39
32	32
33	19
34	50
35	51
36	28
37	35
38	54
39	99
40	40
41	55
42	26
43	33
44	60
45	37
46	162
47	129
48	48
49	49
50	34
51	75
52	44
53	29
54	90
55	87
56	72
57	41
58	46
59	135
60	84
61	47
62	78
63	189
64	64
65	65
66	38
67	63
68	100
69	95
70	102
71	153
72	56
73	31
74	70

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	7
10	10
11	15
12	12
13	11
14	18
15	21
16	16
17	25
18	14
19	27
20	20
21	13
22	30
23	81
24	24
25	17
26	22
27	45
28	36
29	23
30	42
31	39
32	32
33	19
34	50
35	51
36	28
37	35
38	54
39	99
40	40
41	55
42	26
43	33
44	60
45	37
46	162
47	129
48	48
49	49
50	34
51	75
52	44
53	29
54	90
55	87
56	72
57	41
58	46
59	135
60	84
61	47
62	78
63	189
64	64
65	65
66	38
67	63
68	100
69	95
70	102
71	153
72	56
73	31
74	70

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	8
9	7
10	10
11	15
12	12
13	11
14	18
15	21
16	16
17	25
18	14
19	27
20	20
21	13
22	30
23	81
24	24
25	17
26	22
27	45
28	36
29	23
30	42
31	39
32	32
33	19
34	50
35	51
36	28
37	35
38	54
39	99
40	40
41	55
42	26
43	33
44	60
45	37
46	162
47	129
48	48
49	49
50	34
51	75
52	44
53	29
54	90
55	87
56	72
57	41
58	46
59	135
60	84
61	47
62	78
63	189
64	64
65	65
66	38
67	63
68	100
69	95
70	102
71	153
72	56
73	31
74	70