A245613 - cp's OEIS frontend

A245613 Permutation of natural numbers: a(1) = 1; thereafter, if n is k-th number with an odd number of prime divisors (counted with multiplicity) [i.e., n = A026424(k)], a(n) = A244991(a(k)), otherwise, when n is k-th number > 1 with an even number of prime divisors [i.e., n = A028260(1+k)], a(n) = A244990(1+a(k)).

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	6
7	5
8	16
9	9
10	7
11	11
12	10
13	32
14	18
15	13
16	12
17	17
18	15
19	22
20	20
21	35
22	19
23	66
24	14
25	24
26	21
27	34
28	25
29	23
30	33
31	31
32	45
33	63
34	37
35	27
36	26
37	41
38	36
39	29
40	43
41	69
42	40
43	134
44	30
45	47
46	39
47	44
48	68
49	71
50	50
51	38
52	46
53	67
54	131
55	28
56	49
57	42
58	70
59	64
60	52
61	92
62	48
63	127
64	65
65	61
66	75
67	55
68	51
69	89
70	83
71	73
72	60

[1, 2, 4, 3, 8, 6, 5, 16, 9, 7, 11, 10, 32, 18, 13, 12, 17, 15, 22, 20, 35, 19, 66, 14, 24, 21, 34, 25, 23, 33, 31, 45, 63, 37, 27, 26, 41, 36, 29, 43, 69, 40, 134, 30, 47, 39, 44, 68, 71, 50, 38, 46, 67, 131, 28, 49, 42, 70, 64, 52, 92, 48, 127, 65, 61, 75, 55, 51, 89, 83, 73, 60]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	6
7	5
8	16
9	9
10	7
11	11
12	10
13	32
14	18
15	13
16	12
17	17
18	15
19	22
20	20
21	35
22	19
23	66
24	14
25	24
26	21
27	34
28	25
29	23
30	33
31	31
32	45
33	63
34	37
35	27
36	26
37	41
38	36
39	29
40	43
41	69
42	40
43	134
44	30
45	47
46	39
47	44
48	68
49	71
50	50
51	38
52	46
53	67
54	131
55	28
56	49
57	42
58	70
59	64
60	52
61	92
62	48
63	127
64	65
65	61
66	75
67	55
68	51
69	89
70	83
71	73
72	60

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	6
7	5
8	16
9	9
10	7
11	11
12	10
13	32
14	18
15	13
16	12
17	17
18	15
19	22
20	20
21	35
22	19
23	66
24	14
25	24
26	21
27	34
28	25
29	23
30	33
31	31
32	45
33	63
34	37
35	27
36	26
37	41
38	36
39	29
40	43
41	69
42	40
43	134
44	30
45	47
46	39
47	44
48	68
49	71
50	50
51	38
52	46
53	67
54	131
55	28
56	49
57	42
58	70
59	64
60	52
61	92
62	48
63	127
64	65
65	61
66	75
67	55
68	51
69	89
70	83
71	73
72	60

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	6
7	5
8	16
9	9
10	7
11	11
12	10
13	32
14	18
15	13
16	12
17	17
18	15
19	22
20	20
21	35
22	19
23	66
24	14
25	24
26	21
27	34
28	25
29	23
30	33
31	31
32	45
33	63
34	37
35	27
36	26
37	41
38	36
39	29
40	43
41	69
42	40
43	134
44	30
45	47
46	39
47	44
48	68
49	71
50	50
51	38
52	46
53	67
54	131
55	28
56	49
57	42
58	70
59	64
60	52
61	92
62	48
63	127
64	65
65	61
66	75
67	55
68	51
69	89
70	83
71	73
72	60