A268489 - cp's OEIS frontend

A268489 a(n) + f(a(n)) is always odd, where f is the sequence obtained by replacing each term with the corresponding row of A027746 (list of its prime factors). Lexicographic first such sequence without duplicates.

n	a(n)
1	2
2	1
3	5
4	7
5	4
6	10
7	11
8	13
9	8
10	17
11	14
12	16
13	15
14	19
15	22
16	28
17	27
18	30
19	34
20	35
21	36
22	38
23	39
24	42
25	43
26	44
27	46
28	47
29	48
30	50
31	51
32	56
33	57
34	59
35	64
36	66
37	67
38	69
39	70
40	72
41	75
42	77
43	79
44	82
45	84
46	88
47	89
48	91
49	92
50	94
51	96
52	98
53	103
54	104
55	107
56	110
57	112
58	113
59	119
60	121
61	126
62	129
63	132

[2, 1, 5, 7, 4, 10, 11, 13, 8, 17, 14, 16, 15, 19, 22, 28, 27, 30, 34, 35, 36, 38, 39, 42, 43, 44, 46, 47, 48, 50, 51, 56, 57, 59, 64, 66, 67, 69, 70, 72, 75, 77, 79, 82, 84, 88, 89, 91, 92, 94, 96, 98, 103, 104, 107, 110, 112, 113, 119, 121, 126, 129, 132]

cp's OEIS Frontend

A268489 a(n) + f(a(n)) is always odd, where f is the sequence obtained by replacing each term with the corresponding row of A027746 (list of its prime factors). Lexicographic first such sequence without duplicates.

Table of values

List of values

n	a(n)
1	2
2	1
3	5
4	7
5	4
6	10
7	11
8	13
9	8
10	17
11	14
12	16
13	15
14	19
15	22
16	28
17	27
18	30
19	34
20	35
21	36
22	38
23	39
24	42
25	43
26	44
27	46
28	47
29	48
30	50
31	51
32	56
33	57
34	59
35	64
36	66
37	67
38	69
39	70
40	72
41	75
42	77
43	79
44	82
45	84
46	88
47	89
48	91
49	92
50	94
51	96
52	98
53	103
54	104
55	107
56	110
57	112
58	113
59	119
60	121
61	126
62	129
63	132

n	a(n)
1	2
2	1
3	5
4	7
5	4
6	10
7	11
8	13
9	8
10	17
11	14
12	16
13	15
14	19
15	22
16	28
17	27
18	30
19	34
20	35
21	36
22	38
23	39
24	42
25	43
26	44
27	46
28	47
29	48
30	50
31	51
32	56
33	57
34	59
35	64
36	66
37	67
38	69
39	70
40	72
41	75
42	77
43	79
44	82
45	84
46	88
47	89
48	91
49	92
50	94
51	96
52	98
53	103
54	104
55	107
56	110
57	112
58	113
59	119
60	121
61	126
62	129
63	132

n	a(n)
1	2
2	1
3	5
4	7
5	4
6	10
7	11
8	13
9	8
10	17
11	14
12	16
13	15
14	19
15	22
16	28
17	27
18	30
19	34
20	35
21	36
22	38
23	39
24	42
25	43
26	44
27	46
28	47
29	48
30	50
31	51
32	56
33	57
34	59
35	64
36	66
37	67
38	69
39	70
40	72
41	75
42	77
43	79
44	82
45	84
46	88
47	89
48	91
49	92
50	94
51	96
52	98
53	103
54	104
55	107
56	110
57	112
58	113
59	119
60	121
61	126
62	129
63	132