A080458 - cp's OEIS frontend

A080458 a(1)=4; 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	4
2	8
3	12
4	12
5	16
6	20
7	24
8	24
9	28
10	32
11	36
12	36
13	40
14	44
15	48
16	48
17	52
18	56
19	60
20	60
21	64
22	68
23	72
24	72
25	76
26	80
27	84
28	84
29	88
30	92
31	96
32	96
33	100
34	104
35	108
36	108
37	112
38	116
39	120
40	120
41	124
42	128
43	132
44	132
45	136
46	140
47	144
48	144
49	148
50	152
51	156
52	156
53	160
54	164
55	168
56	168
57	172
58	176

[4, 8, 12, 12, 16, 20, 24, 24, 28, 32, 36, 36, 40, 44, 48, 48, 52, 56, 60, 60, 64, 68, 72, 72, 76, 80, 84, 84, 88, 92, 96, 96, 100, 104, 108, 108, 112, 116, 120, 120, 124, 128, 132, 132, 136, 140, 144, 144, 148, 152, 156, 156, 160, 164, 168, 168, 172, 176]

cp's OEIS Frontend

A080458 a(1)=4; 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	4
2	8
3	12
4	12
5	16
6	20
7	24
8	24
9	28
10	32
11	36
12	36
13	40
14	44
15	48
16	48
17	52
18	56
19	60
20	60
21	64
22	68
23	72
24	72
25	76
26	80
27	84
28	84
29	88
30	92
31	96
32	96
33	100
34	104
35	108
36	108
37	112
38	116
39	120
40	120
41	124
42	128
43	132
44	132
45	136
46	140
47	144
48	144
49	148
50	152
51	156
52	156
53	160
54	164
55	168
56	168
57	172
58	176

n	a(n)
1	4
2	8
3	12
4	12
5	16
6	20
7	24
8	24
9	28
10	32
11	36
12	36
13	40
14	44
15	48
16	48
17	52
18	56
19	60
20	60
21	64
22	68
23	72
24	72
25	76
26	80
27	84
28	84
29	88
30	92
31	96
32	96
33	100
34	104
35	108
36	108
37	112
38	116
39	120
40	120
41	124
42	128
43	132
44	132
45	136
46	140
47	144
48	144
49	148
50	152
51	156
52	156
53	160
54	164
55	168
56	168
57	172
58	176

n	a(n)
1	4
2	8
3	12
4	12
5	16
6	20
7	24
8	24
9	28
10	32
11	36
12	36
13	40
14	44
15	48
16	48
17	52
18	56
19	60
20	60
21	64
22	68
23	72
24	72
25	76
26	80
27	84
28	84
29	88
30	92
31	96
32	96
33	100
34	104
35	108
36	108
37	112
38	116
39	120
40	120
41	124
42	128
43	132
44	132
45	136
46	140
47	144
48	144
49	148
50	152
51	156
52	156
53	160
54	164
55	168
56	168
57	172
58	176