A080725 - cp's OEIS frontend

A080725 a(1) = 2; for n>1, a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) == 1 mod 3".

n	a(n)
1	2
2	4
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	16
11	19
12	20
13	22
14	25
15	28
16	31
17	32
18	33
19	34
20	37
21	38
22	40
23	41
24	42
25	43
26	44
27	45
28	46
29	47
30	48
31	49
32	52
33	55
34	58
35	59
36	60
37	61
38	64
39	65
40	67
41	70
42	73
43	76
44	79
45	82
46	85
47	88
48	91
49	94
50	95
51	96
52	97
53	98
54	99
55	100
56	101
57	102
58	103
59	106
60	109
61	112
62	113
63	114
64	115
65	118
66	119
67	121

[2, 4, 5, 7, 10, 11, 13, 14, 15, 16, 19, 20, 22, 25, 28, 31, 32, 33, 34, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 52, 55, 58, 59, 60, 61, 64, 65, 67, 70, 73, 76, 79, 82, 85, 88, 91, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 106, 109, 112, 113, 114, 115, 118, 119, 121]

cp's OEIS Frontend

A080725 a(1) = 2; for n>1, a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) == 1 mod 3".

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	16
11	19
12	20
13	22
14	25
15	28
16	31
17	32
18	33
19	34
20	37
21	38
22	40
23	41
24	42
25	43
26	44
27	45
28	46
29	47
30	48
31	49
32	52
33	55
34	58
35	59
36	60
37	61
38	64
39	65
40	67
41	70
42	73
43	76
44	79
45	82
46	85
47	88
48	91
49	94
50	95
51	96
52	97
53	98
54	99
55	100
56	101
57	102
58	103
59	106
60	109
61	112
62	113
63	114
64	115
65	118
66	119
67	121

n	a(n)
1	2
2	4
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	16
11	19
12	20
13	22
14	25
15	28
16	31
17	32
18	33
19	34
20	37
21	38
22	40
23	41
24	42
25	43
26	44
27	45
28	46
29	47
30	48
31	49
32	52
33	55
34	58
35	59
36	60
37	61
38	64
39	65
40	67
41	70
42	73
43	76
44	79
45	82
46	85
47	88
48	91
49	94
50	95
51	96
52	97
53	98
54	99
55	100
56	101
57	102
58	103
59	106
60	109
61	112
62	113
63	114
64	115
65	118
66	119
67	121

n	a(n)
1	2
2	4
3	5
4	7
5	10
6	11
7	13
8	14
9	15
10	16
11	19
12	20
13	22
14	25
15	28
16	31
17	32
18	33
19	34
20	37
21	38
22	40
23	41
24	42
25	43
26	44
27	45
28	46
29	47
30	48
31	49
32	52
33	55
34	58
35	59
36	60
37	61
38	64
39	65
40	67
41	70
42	73
43	76
44	79
45	82
46	85
47	88
48	91
49	94
50	95
51	96
52	97
53	98
54	99
55	100
56	101
57	102
58	103
59	106
60	109
61	112
62	113
63	114
64	115
65	118
66	119
67	121