A245614 - cp's OEIS frontend

A245614 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) = A026424(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) = A028260(1+a(k)).

n	a(n)
1	1
2	2
3	4
4	3
5	7
6	6
7	10
8	5
9	9
10	12
11	11
12	16
13	15
14	24
15	18
16	8
17	17
18	14
19	22
20	20
21	26
22	19
23	29
24	25
25	28
26	36
27	35
28	55
29	39
30	44
31	31
32	13
33	30
34	27
35	21
36	38
37	34
38	51
39	46
40	42
41	37
42	57
43	40
44	47
45	32
46	52
47	45
48	62
49	56
50	50
51	68
52	60
53	82
54	81
55	67
56	121
57	86
58	93
59	105
60	72
61	65
62	79
63	33
64	59
65	64
66	23
67	53
68	48
69	41
70	58
71	49
72	85
73	71
74	77
75	66
76	111
77	99

[1, 2, 4, 3, 7, 6, 10, 5, 9, 12, 11, 16, 15, 24, 18, 8, 17, 14, 22, 20, 26, 19, 29, 25, 28, 36, 35, 55, 39, 44, 31, 13, 30, 27, 21, 38, 34, 51, 46, 42, 37, 57, 40, 47, 32, 52, 45, 62, 56, 50, 68, 60, 82, 81, 67, 121, 86, 93, 105, 72, 65, 79, 33, 59, 64, 23, 53, 48, 41, 58, 49, 85, 71, 77, 66, 111, 99]

cp's OEIS Frontend

A245614 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) = A026424(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) = A028260(1+a(k)).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	3
5	7
6	6
7	10
8	5
9	9
10	12
11	11
12	16
13	15
14	24
15	18
16	8
17	17
18	14
19	22
20	20
21	26
22	19
23	29
24	25
25	28
26	36
27	35
28	55
29	39
30	44
31	31
32	13
33	30
34	27
35	21
36	38
37	34
38	51
39	46
40	42
41	37
42	57
43	40
44	47
45	32
46	52
47	45
48	62
49	56
50	50
51	68
52	60
53	82
54	81
55	67
56	121
57	86
58	93
59	105
60	72
61	65
62	79
63	33
64	59
65	64
66	23
67	53
68	48
69	41
70	58
71	49
72	85
73	71
74	77
75	66
76	111
77	99

n	a(n)
1	1
2	2
3	4
4	3
5	7
6	6
7	10
8	5
9	9
10	12
11	11
12	16
13	15
14	24
15	18
16	8
17	17
18	14
19	22
20	20
21	26
22	19
23	29
24	25
25	28
26	36
27	35
28	55
29	39
30	44
31	31
32	13
33	30
34	27
35	21
36	38
37	34
38	51
39	46
40	42
41	37
42	57
43	40
44	47
45	32
46	52
47	45
48	62
49	56
50	50
51	68
52	60
53	82
54	81
55	67
56	121
57	86
58	93
59	105
60	72
61	65
62	79
63	33
64	59
65	64
66	23
67	53
68	48
69	41
70	58
71	49
72	85
73	71
74	77
75	66
76	111
77	99

n	a(n)
1	1
2	2
3	4
4	3
5	7
6	6
7	10
8	5
9	9
10	12
11	11
12	16
13	15
14	24
15	18
16	8
17	17
18	14
19	22
20	20
21	26
22	19
23	29
24	25
25	28
26	36
27	35
28	55
29	39
30	44
31	31
32	13
33	30
34	27
35	21
36	38
37	34
38	51
39	46
40	42
41	37
42	57
43	40
44	47
45	32
46	52
47	45
48	62
49	56
50	50
51	68
52	60
53	82
54	81
55	67
56	121
57	86
58	93
59	105
60	72
61	65
62	79
63	33
64	59
65	64
66	23
67	53
68	48
69	41
70	58
71	49
72	85
73	71
74	77
75	66
76	111
77	99