A050128 - cp's OEIS frontend

A050128 a(n) = floor(a(n-1)/2) if this is not among 0, a(1), ..., a(n-1); otherwise a(n) = 2*n.

n	a(n)
1	1
2	4
3	2
4	8
5	10
6	5
7	14
8	7
9	3
10	20
11	22
12	11
13	26
14	13
15	6
16	32
17	16
18	36
19	18
20	9
21	42
22	21
23	46
24	23
25	50
26	25
27	12
28	56
29	28
30	60
31	30
32	15
33	66
34	33
35	70
36	35
37	17
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	90
46	45
47	94
48	47
49	98
50	49
51	24
52	104
53	52
54	108
55	54
56	27
57	114
58	57
59	118
60	59
61	29
62	124

[1, 4, 2, 8, 10, 5, 14, 7, 3, 20, 22, 11, 26, 13, 6, 32, 16, 36, 18, 9, 42, 21, 46, 23, 50, 25, 12, 56, 28, 60, 30, 15, 66, 33, 70, 35, 17, 76, 38, 19, 82, 41, 86, 43, 90, 45, 94, 47, 98, 49, 24, 104, 52, 108, 54, 27, 114, 57, 118, 59, 29, 124]

cp's OEIS Frontend

A050128 a(n) = floor(a(n-1)/2) if this is not among 0, a(1), ..., a(n-1); otherwise a(n) = 2*n.

Table of values

List of values

n	a(n)
1	1
2	4
3	2
4	8
5	10
6	5
7	14
8	7
9	3
10	20
11	22
12	11
13	26
14	13
15	6
16	32
17	16
18	36
19	18
20	9
21	42
22	21
23	46
24	23
25	50
26	25
27	12
28	56
29	28
30	60
31	30
32	15
33	66
34	33
35	70
36	35
37	17
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	90
46	45
47	94
48	47
49	98
50	49
51	24
52	104
53	52
54	108
55	54
56	27
57	114
58	57
59	118
60	59
61	29
62	124

n	a(n)
1	1
2	4
3	2
4	8
5	10
6	5
7	14
8	7
9	3
10	20
11	22
12	11
13	26
14	13
15	6
16	32
17	16
18	36
19	18
20	9
21	42
22	21
23	46
24	23
25	50
26	25
27	12
28	56
29	28
30	60
31	30
32	15
33	66
34	33
35	70
36	35
37	17
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	90
46	45
47	94
48	47
49	98
50	49
51	24
52	104
53	52
54	108
55	54
56	27
57	114
58	57
59	118
60	59
61	29
62	124

n	a(n)
1	1
2	4
3	2
4	8
5	10
6	5
7	14
8	7
9	3
10	20
11	22
12	11
13	26
14	13
15	6
16	32
17	16
18	36
19	18
20	9
21	42
22	21
23	46
24	23
25	50
26	25
27	12
28	56
29	28
30	60
31	30
32	15
33	66
34	33
35	70
36	35
37	17
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	90
46	45
47	94
48	47
49	98
50	49
51	24
52	104
53	52
54	108
55	54
56	27
57	114
58	57
59	118
60	59
61	29
62	124