A081746 - cp's OEIS frontend

A081746 a(1)=1; for n>1, a(n)=a(n-1)-3 if n is already in the sequence, a(n)=a(n-1)+5 otherwise.

n	a(n)
1	1
2	6
3	11
4	16
5	21
6	18
7	23
8	28
9	33
10	38
11	35
12	40
13	45
14	50
15	55
16	52
17	57
18	54
19	59
20	64
21	61
22	66
23	63
24	68
25	73
26	78
27	83
28	80
29	85
30	90
31	95
32	100
33	97
34	102
35	99
36	104
37	109
38	106
39	111
40	108
41	113
42	118
43	123
44	128
45	125
46	130
47	135
48	140
49	145
50	142
51	147
52	144
53	149
54	146
55	143
56	148
57	145
58	150

[1, 6, 11, 16, 21, 18, 23, 28, 33, 38, 35, 40, 45, 50, 55, 52, 57, 54, 59, 64, 61, 66, 63, 68, 73, 78, 83, 80, 85, 90, 95, 100, 97, 102, 99, 104, 109, 106, 111, 108, 113, 118, 123, 128, 125, 130, 135, 140, 145, 142, 147, 144, 149, 146, 143, 148, 145, 150]

cp's OEIS Frontend

A081746 a(1)=1; for n>1, a(n)=a(n-1)-3 if n is already in the sequence, a(n)=a(n-1)+5 otherwise.

Table of values

List of values

n	a(n)
1	1
2	6
3	11
4	16
5	21
6	18
7	23
8	28
9	33
10	38
11	35
12	40
13	45
14	50
15	55
16	52
17	57
18	54
19	59
20	64
21	61
22	66
23	63
24	68
25	73
26	78
27	83
28	80
29	85
30	90
31	95
32	100
33	97
34	102
35	99
36	104
37	109
38	106
39	111
40	108
41	113
42	118
43	123
44	128
45	125
46	130
47	135
48	140
49	145
50	142
51	147
52	144
53	149
54	146
55	143
56	148
57	145
58	150

n	a(n)
1	1
2	6
3	11
4	16
5	21
6	18
7	23
8	28
9	33
10	38
11	35
12	40
13	45
14	50
15	55
16	52
17	57
18	54
19	59
20	64
21	61
22	66
23	63
24	68
25	73
26	78
27	83
28	80
29	85
30	90
31	95
32	100
33	97
34	102
35	99
36	104
37	109
38	106
39	111
40	108
41	113
42	118
43	123
44	128
45	125
46	130
47	135
48	140
49	145
50	142
51	147
52	144
53	149
54	146
55	143
56	148
57	145
58	150

n	a(n)
1	1
2	6
3	11
4	16
5	21
6	18
7	23
8	28
9	33
10	38
11	35
12	40
13	45
14	50
15	55
16	52
17	57
18	54
19	59
20	64
21	61
22	66
23	63
24	68
25	73
26	78
27	83
28	80
29	85
30	90
31	95
32	100
33	97
34	102
35	99
36	104
37	109
38	106
39	111
40	108
41	113
42	118
43	123
44	128
45	125
46	130
47	135
48	140
49	145
50	142
51	147
52	144
53	149
54	146
55	143
56	148
57	145
58	150