A080579 - cp's OEIS frontend

A080579 a(1)=1; for n>1, a(n)=a(n-1)+1 if n is already in the sequence, a(n)=a(n-1)+4 otherwise.

n	a(n)
1	1
2	5
3	9
4	13
5	14
6	18
7	22
8	26
9	27
10	31
11	35
12	39
13	40
14	41
15	45
16	49
17	53
18	54
19	58
20	62
21	66
22	67
23	71
24	75
25	79
26	80
27	81
28	85
29	89
30	93
31	94
32	98
33	102
34	106
35	107
36	111
37	115
38	119
39	120
40	121
41	122
42	126
43	130
44	134
45	135
46	139
47	143
48	147
49	148
50	152
51	156
52	160
53	161
54	162
55	166
56	170
57	174
58	175

[1, 5, 9, 13, 14, 18, 22, 26, 27, 31, 35, 39, 40, 41, 45, 49, 53, 54, 58, 62, 66, 67, 71, 75, 79, 80, 81, 85, 89, 93, 94, 98, 102, 106, 107, 111, 115, 119, 120, 121, 122, 126, 130, 134, 135, 139, 143, 147, 148, 152, 156, 160, 161, 162, 166, 170, 174, 175]

cp's OEIS Frontend

A080579 a(1)=1; for n>1, a(n)=a(n-1)+1 if n is already in the sequence, a(n)=a(n-1)+4 otherwise.

Table of values

List of values

n	a(n)
1	1
2	5
3	9
4	13
5	14
6	18
7	22
8	26
9	27
10	31
11	35
12	39
13	40
14	41
15	45
16	49
17	53
18	54
19	58
20	62
21	66
22	67
23	71
24	75
25	79
26	80
27	81
28	85
29	89
30	93
31	94
32	98
33	102
34	106
35	107
36	111
37	115
38	119
39	120
40	121
41	122
42	126
43	130
44	134
45	135
46	139
47	143
48	147
49	148
50	152
51	156
52	160
53	161
54	162
55	166
56	170
57	174
58	175

n	a(n)
1	1
2	5
3	9
4	13
5	14
6	18
7	22
8	26
9	27
10	31
11	35
12	39
13	40
14	41
15	45
16	49
17	53
18	54
19	58
20	62
21	66
22	67
23	71
24	75
25	79
26	80
27	81
28	85
29	89
30	93
31	94
32	98
33	102
34	106
35	107
36	111
37	115
38	119
39	120
40	121
41	122
42	126
43	130
44	134
45	135
46	139
47	143
48	147
49	148
50	152
51	156
52	160
53	161
54	162
55	166
56	170
57	174
58	175

n	a(n)
1	1
2	5
3	9
4	13
5	14
6	18
7	22
8	26
9	27
10	31
11	35
12	39
13	40
14	41
15	45
16	49
17	53
18	54
19	58
20	62
21	66
22	67
23	71
24	75
25	79
26	80
27	81
28	85
29	89
30	93
31	94
32	98
33	102
34	106
35	107
36	111
37	115
38	119
39	120
40	121
41	122
42	126
43	130
44	134
45	135
46	139
47	143
48	147
49	148
50	152
51	156
52	160
53	161
54	162
55	166
56	170
57	174
58	175