A161186 - cp's OEIS frontend

A161186 In the sequence of nonprime numbers, an element k's position is either prime or nonprime. If k's position is prime, f(k)= the k-th nonprime-positioned element, else f(k) is the k-th prime-positioned element. Iterated application of x-> f(x) gives disjoint sequences generated by the first elements, which form the current sequence.

n	a(n)
1	1
2	6
3	8
4	9
5	10
6	12
7	15
8	18
9	20
10	21
11	22
12	25
13	26
14	27
15	32
16	33
17	34
18	35
19	36
20	38
21	40
22	44
23	45
24	48
25	49
26	50
27	51
28	52
29	55
30	57
31	58
32	62
33	63
34	64
35	66
36	69
37	70
38	72
39	75
40	76
41	77
42	78
43	81
44	82
45	84
46	85
47	87
48	88
49	90
50	91
51	92
52	93
53	94
54	98
55	99
56	100
57	102
58	104
59	108
60	110
61	112
62	114
63	115
64	116
65	117
66	120

[1, 6, 8, 9, 10, 12, 15, 18, 20, 21, 22, 25, 26, 27, 32, 33, 34, 35, 36, 38, 40, 44, 45, 48, 49, 50, 51, 52, 55, 57, 58, 62, 63, 64, 66, 69, 70, 72, 75, 76, 77, 78, 81, 82, 84, 85, 87, 88, 90, 91, 92, 93, 94, 98, 99, 100, 102, 104, 108, 110, 112, 114, 115, 116, 117, 120]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	6
3	8
4	9
5	10
6	12
7	15
8	18
9	20
10	21
11	22
12	25
13	26
14	27
15	32
16	33
17	34
18	35
19	36
20	38
21	40
22	44
23	45
24	48
25	49
26	50
27	51
28	52
29	55
30	57
31	58
32	62
33	63
34	64
35	66
36	69
37	70
38	72
39	75
40	76
41	77
42	78
43	81
44	82
45	84
46	85
47	87
48	88
49	90
50	91
51	92
52	93
53	94
54	98
55	99
56	100
57	102
58	104
59	108
60	110
61	112
62	114
63	115
64	116
65	117
66	120

n	a(n)
1	1
2	6
3	8
4	9
5	10
6	12
7	15
8	18
9	20
10	21
11	22
12	25
13	26
14	27
15	32
16	33
17	34
18	35
19	36
20	38
21	40
22	44
23	45
24	48
25	49
26	50
27	51
28	52
29	55
30	57
31	58
32	62
33	63
34	64
35	66
36	69
37	70
38	72
39	75
40	76
41	77
42	78
43	81
44	82
45	84
46	85
47	87
48	88
49	90
50	91
51	92
52	93
53	94
54	98
55	99
56	100
57	102
58	104
59	108
60	110
61	112
62	114
63	115
64	116
65	117
66	120

n	a(n)
1	1
2	6
3	8
4	9
5	10
6	12
7	15
8	18
9	20
10	21
11	22
12	25
13	26
14	27
15	32
16	33
17	34
18	35
19	36
20	38
21	40
22	44
23	45
24	48
25	49
26	50
27	51
28	52
29	55
30	57
31	58
32	62
33	63
34	64
35	66
36	69
37	70
38	72
39	75
40	76
41	77
42	78
43	81
44	82
45	84
46	85
47	87
48	88
49	90
50	91
51	92
52	93
53	94
54	98
55	99
56	100
57	102
58	104
59	108
60	110
61	112
62	114
63	115
64	116
65	117
66	120