A080455 - cp's OEIS frontend

A080455 a(1)=1; for n>1, a(n) = a(n-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	13
6	17
7	21
8	25
9	25
10	29
11	33
12	37
13	37
14	41
15	45
16	49
17	49
18	53
19	57
20	61
21	61
22	65
23	69
24	73
25	73
26	77
27	81
28	85
29	85
30	89
31	93
32	97
33	97
34	101
35	105
36	109
37	109
38	113
39	117
40	121
41	121
42	125
43	129
44	133
45	133
46	137
47	141
48	145
49	145
50	149
51	153
52	157
53	157
54	161
55	165
56	169
57	169
58	173

[1, 5, 9, 13, 13, 17, 21, 25, 25, 29, 33, 37, 37, 41, 45, 49, 49, 53, 57, 61, 61, 65, 69, 73, 73, 77, 81, 85, 85, 89, 93, 97, 97, 101, 105, 109, 109, 113, 117, 121, 121, 125, 129, 133, 133, 137, 141, 145, 145, 149, 153, 157, 157, 161, 165, 169, 169, 173]

cp's OEIS Frontend

A080455 a(1)=1; for n>1, a(n) = a(n-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	13
6	17
7	21
8	25
9	25
10	29
11	33
12	37
13	37
14	41
15	45
16	49
17	49
18	53
19	57
20	61
21	61
22	65
23	69
24	73
25	73
26	77
27	81
28	85
29	85
30	89
31	93
32	97
33	97
34	101
35	105
36	109
37	109
38	113
39	117
40	121
41	121
42	125
43	129
44	133
45	133
46	137
47	141
48	145
49	145
50	149
51	153
52	157
53	157
54	161
55	165
56	169
57	169
58	173

n	a(n)
1	1
2	5
3	9
4	13
5	13
6	17
7	21
8	25
9	25
10	29
11	33
12	37
13	37
14	41
15	45
16	49
17	49
18	53
19	57
20	61
21	61
22	65
23	69
24	73
25	73
26	77
27	81
28	85
29	85
30	89
31	93
32	97
33	97
34	101
35	105
36	109
37	109
38	113
39	117
40	121
41	121
42	125
43	129
44	133
45	133
46	137
47	141
48	145
49	145
50	149
51	153
52	157
53	157
54	161
55	165
56	169
57	169
58	173

n	a(n)
1	1
2	5
3	9
4	13
5	13
6	17
7	21
8	25
9	25
10	29
11	33
12	37
13	37
14	41
15	45
16	49
17	49
18	53
19	57
20	61
21	61
22	65
23	69
24	73
25	73
26	77
27	81
28	85
29	85
30	89
31	93
32	97
33	97
34	101
35	105
36	109
37	109
38	113
39	117
40	121
41	121
42	125
43	129
44	133
45	133
46	137
47	141
48	145
49	145
50	149
51	153
52	157
53	157
54	161
55	165
56	169
57	169
58	173