A244321 - cp's OEIS frontend

A244321 Permutation of natural numbers: a(1)=1; thereafter, if n is k-th number whose greatest prime factor has an odd index [i.e., n = A244991(k)], a(n) = 2a(k), otherwise, when n is k-th number whose greatest prime factor has an even index [i.e., n = A244990(1+k)], a(n) = 1+(2a(k)).

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

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

cp's OEIS Frontend

A244321 Permutation of natural numbers: a(1)=1; thereafter, if n is k-th number whose greatest prime factor has an odd index [i.e., n = A244991(k)], a(n) = 2a(k), otherwise, when n is k-th number whose greatest prime factor has an even index [i.e., n = A244990(1+k)], a(n) = 1+(2a(k)).

Table of values

List of values

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

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

cp's OEIS Frontend

A244321 Permutation of natural numbers: a(1)=1; thereafter, if n is k-th number whose greatest prime factor has an odd index [i.e., n = A244991(k)], a(n) = 2*a(k), otherwise, when n is k-th number whose greatest prime factor has an even index [i.e., n = A244990(1+k)], a(n) = 1+(2*a(k)).

Table of values

List of values

A244321 Permutation of natural numbers: a(1)=1; thereafter, if n is k-th number whose greatest prime factor has an odd index [i.e., n = A244991(k)], a(n) = 2a(k), otherwise, when n is k-th number whose greatest prime factor has an even index [i.e., n = A244990(1+k)], a(n) = 1+(2a(k)).

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