A080731 - cp's OEIS frontend

A080731 a(1)=1; a(2)=6; for n > 2, a(n) is taken as the smallest positive integer greater than a(n-1) such that the condition "n is a member of the sequence if and only if a(n) is odd" is satisfied.

n	a(n)
1	1
2	6
3	8
4	10
5	12
6	13
7	14
8	15
9	16
10	17
11	18
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	34
21	35
22	36
23	37
24	38
25	39
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	47
34	49
35	51
36	53
37	55
38	57
39	59
40	61
41	63
42	65
43	67
44	69
45	71
46	73
47	75
48	76
49	77
50	78
51	79
52	80
53	81
54	82
55	83
56	84
57	85
58	86
59	87
60	88
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98

[1, 6, 8, 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 23, 25, 27, 29, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98]

cp's OEIS Frontend

A080731 a(1)=1; a(2)=6; for n > 2, a(n) is taken as the smallest positive integer greater than a(n-1) such that the condition "n is a member of the sequence if and only if a(n) is odd" is satisfied.

Table of values

List of values

n	a(n)
1	1
2	6
3	8
4	10
5	12
6	13
7	14
8	15
9	16
10	17
11	18
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	34
21	35
22	36
23	37
24	38
25	39
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	47
34	49
35	51
36	53
37	55
38	57
39	59
40	61
41	63
42	65
43	67
44	69
45	71
46	73
47	75
48	76
49	77
50	78
51	79
52	80
53	81
54	82
55	83
56	84
57	85
58	86
59	87
60	88
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98

n	a(n)
1	1
2	6
3	8
4	10
5	12
6	13
7	14
8	15
9	16
10	17
11	18
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	34
21	35
22	36
23	37
24	38
25	39
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	47
34	49
35	51
36	53
37	55
38	57
39	59
40	61
41	63
42	65
43	67
44	69
45	71
46	73
47	75
48	76
49	77
50	78
51	79
52	80
53	81
54	82
55	83
56	84
57	85
58	86
59	87
60	88
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98

n	a(n)
1	1
2	6
3	8
4	10
5	12
6	13
7	14
8	15
9	16
10	17
11	18
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	34
21	35
22	36
23	37
24	38
25	39
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	47
34	49
35	51
36	53
37	55
38	57
39	59
40	61
41	63
42	65
43	67
44	69
45	71
46	73
47	75
48	76
49	77
50	78
51	79
52	80
53	81
54	82
55	83
56	84
57	85
58	86
59	87
60	88
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98