A050137 - cp's OEIS frontend

A050137 a(1)=2; 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	2
2	1
3	6
4	3
5	10
6	5
7	14
8	7
9	18
10	9
11	4
12	24
13	12
14	28
15	30
16	15
17	34
18	17
19	8
20	40
21	20
22	44
23	22
24	11
25	50
26	25
27	54
28	27
29	13
30	60
31	62
32	31
33	66
34	33
35	16
36	72
37	36
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	21
46	92
47	46
48	23
49	98
50	49
51	102
52	51
53	106
54	53
55	26
56	112
57	56
58	116
59	58
60	29
61	122
62	61

[2, 1, 6, 3, 10, 5, 14, 7, 18, 9, 4, 24, 12, 28, 30, 15, 34, 17, 8, 40, 20, 44, 22, 11, 50, 25, 54, 27, 13, 60, 62, 31, 66, 33, 16, 72, 36, 76, 38, 19, 82, 41, 86, 43, 21, 92, 46, 23, 98, 49, 102, 51, 106, 53, 26, 112, 56, 116, 58, 29, 122, 61]

cp's OEIS Frontend

A050137 a(1)=2; 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	2
2	1
3	6
4	3
5	10
6	5
7	14
8	7
9	18
10	9
11	4
12	24
13	12
14	28
15	30
16	15
17	34
18	17
19	8
20	40
21	20
22	44
23	22
24	11
25	50
26	25
27	54
28	27
29	13
30	60
31	62
32	31
33	66
34	33
35	16
36	72
37	36
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	21
46	92
47	46
48	23
49	98
50	49
51	102
52	51
53	106
54	53
55	26
56	112
57	56
58	116
59	58
60	29
61	122
62	61

n	a(n)
1	2
2	1
3	6
4	3
5	10
6	5
7	14
8	7
9	18
10	9
11	4
12	24
13	12
14	28
15	30
16	15
17	34
18	17
19	8
20	40
21	20
22	44
23	22
24	11
25	50
26	25
27	54
28	27
29	13
30	60
31	62
32	31
33	66
34	33
35	16
36	72
37	36
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	21
46	92
47	46
48	23
49	98
50	49
51	102
52	51
53	106
54	53
55	26
56	112
57	56
58	116
59	58
60	29
61	122
62	61

n	a(n)
1	2
2	1
3	6
4	3
5	10
6	5
7	14
8	7
9	18
10	9
11	4
12	24
13	12
14	28
15	30
16	15
17	34
18	17
19	8
20	40
21	20
22	44
23	22
24	11
25	50
26	25
27	54
28	27
29	13
30	60
31	62
32	31
33	66
34	33
35	16
36	72
37	36
38	76
39	38
40	19
41	82
42	41
43	86
44	43
45	21
46	92
47	46
48	23
49	98
50	49
51	102
52	51
53	106
54	53
55	26
56	112
57	56
58	116
59	58
60	29
61	122
62	61