A086377 - cp's OEIS frontend

A086377 a(1)=1; a(n)=a(n-1)+2 if n is in the sequence; a(n)=a(n-1)+2 if n and (n-1) are not in the sequence; a(n)=a(n-1)+3 if n is not in the sequence but (n-1) is in the sequence.

n	a(n)
1	1
2	4
3	6
4	8
5	11
6	13
7	16
8	18
9	21
10	23
11	25
12	28
13	30
14	33
15	35
16	37
17	40
18	42
19	45
20	47
21	49
22	52
23	54
24	57
25	59
26	62
27	64
28	66
29	69
30	71
31	74
32	76
33	78
34	81
35	83
36	86
37	88
38	91
39	93
40	95
41	98
42	100
43	103
44	105
45	107
46	110
47	112
48	115
49	117
50	120
51	122
52	124
53	127
54	129
55	132
56	134
57	136
58	139
59	141
60	144
61	146
62	148
63	151

[1, 4, 6, 8, 11, 13, 16, 18, 21, 23, 25, 28, 30, 33, 35, 37, 40, 42, 45, 47, 49, 52, 54, 57, 59, 62, 64, 66, 69, 71, 74, 76, 78, 81, 83, 86, 88, 91, 93, 95, 98, 100, 103, 105, 107, 110, 112, 115, 117, 120, 122, 124, 127, 129, 132, 134, 136, 139, 141, 144, 146, 148, 151]

cp's OEIS Frontend

A086377 a(1)=1; a(n)=a(n-1)+2 if n is in the sequence; a(n)=a(n-1)+2 if n and (n-1) are not in the sequence; a(n)=a(n-1)+3 if n is not in the sequence but (n-1) is in the sequence.

Table of values

List of values

n	a(n)
1	1
2	4
3	6
4	8
5	11
6	13
7	16
8	18
9	21
10	23
11	25
12	28
13	30
14	33
15	35
16	37
17	40
18	42
19	45
20	47
21	49
22	52
23	54
24	57
25	59
26	62
27	64
28	66
29	69
30	71
31	74
32	76
33	78
34	81
35	83
36	86
37	88
38	91
39	93
40	95
41	98
42	100
43	103
44	105
45	107
46	110
47	112
48	115
49	117
50	120
51	122
52	124
53	127
54	129
55	132
56	134
57	136
58	139
59	141
60	144
61	146
62	148
63	151

n	a(n)
1	1
2	4
3	6
4	8
5	11
6	13
7	16
8	18
9	21
10	23
11	25
12	28
13	30
14	33
15	35
16	37
17	40
18	42
19	45
20	47
21	49
22	52
23	54
24	57
25	59
26	62
27	64
28	66
29	69
30	71
31	74
32	76
33	78
34	81
35	83
36	86
37	88
38	91
39	93
40	95
41	98
42	100
43	103
44	105
45	107
46	110
47	112
48	115
49	117
50	120
51	122
52	124
53	127
54	129
55	132
56	134
57	136
58	139
59	141
60	144
61	146
62	148
63	151

n	a(n)
1	1
2	4
3	6
4	8
5	11
6	13
7	16
8	18
9	21
10	23
11	25
12	28
13	30
14	33
15	35
16	37
17	40
18	42
19	45
20	47
21	49
22	52
23	54
24	57
25	59
26	62
27	64
28	66
29	69
30	71
31	74
32	76
33	78
34	81
35	83
36	86
37	88
38	91
39	93
40	95
41	98
42	100
43	103
44	105
45	107
46	110
47	112
48	115
49	117
50	120
51	122
52	124
53	127
54	129
55	132
56	134
57	136
58	139
59	141
60	144
61	146
62	148
63	151