A117384 - cp's OEIS frontend

A117384 Positive integers, each occurring twice in the sequence, such that a(n) = a(k) when n+k = 4*a(n), starting with a(1)=1 and filling the next vacant position with the smallest unused number.

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	2
7	5
8	3
9	6
10	7
11	4
12	8
13	5
14	9
15	6
16	10
17	11
18	7
19	12
20	8
21	13
22	9
23	14
24	10
25	15
26	16
27	11
28	17
29	12
30	18
31	13
32	19
33	14
34	20
35	15
36	21
37	22
38	16
39	23
40	17
41	24
42	18
43	25
44	19
45	26
46	20
47	27
48	21
49	28
50	29
51	22
52	30
53	23
54	31
55	24
56	32
57	25
58	33
59	26
60	34
61	27
62	35
63	28
64	36
65	37
66	29
67	38
68	30
69	39
70	31
71	40
72	32
73	41
74	33
75	42

[1, 2, 1, 3, 4, 2, 5, 3, 6, 7, 4, 8, 5, 9, 6, 10, 11, 7, 12, 8, 13, 9, 14, 10, 15, 16, 11, 17, 12, 18, 13, 19, 14, 20, 15, 21, 22, 16, 23, 17, 24, 18, 25, 19, 26, 20, 27, 21, 28, 29, 22, 30, 23, 31, 24, 32, 25, 33, 26, 34, 27, 35, 28, 36, 37, 29, 38, 30, 39, 31, 40, 32, 41, 33, 42]

cp's OEIS Frontend

A117384 Positive integers, each occurring twice in the sequence, such that a(n) = a(k) when n+k = 4*a(n), starting with a(1)=1 and filling the next vacant position with the smallest unused number.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	2
7	5
8	3
9	6
10	7
11	4
12	8
13	5
14	9
15	6
16	10
17	11
18	7
19	12
20	8
21	13
22	9
23	14
24	10
25	15
26	16
27	11
28	17
29	12
30	18
31	13
32	19
33	14
34	20
35	15
36	21
37	22
38	16
39	23
40	17
41	24
42	18
43	25
44	19
45	26
46	20
47	27
48	21
49	28
50	29
51	22
52	30
53	23
54	31
55	24
56	32
57	25
58	33
59	26
60	34
61	27
62	35
63	28
64	36
65	37
66	29
67	38
68	30
69	39
70	31
71	40
72	32
73	41
74	33
75	42

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	2
7	5
8	3
9	6
10	7
11	4
12	8
13	5
14	9
15	6
16	10
17	11
18	7
19	12
20	8
21	13
22	9
23	14
24	10
25	15
26	16
27	11
28	17
29	12
30	18
31	13
32	19
33	14
34	20
35	15
36	21
37	22
38	16
39	23
40	17
41	24
42	18
43	25
44	19
45	26
46	20
47	27
48	21
49	28
50	29
51	22
52	30
53	23
54	31
55	24
56	32
57	25
58	33
59	26
60	34
61	27
62	35
63	28
64	36
65	37
66	29
67	38
68	30
69	39
70	31
71	40
72	32
73	41
74	33
75	42

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	2
7	5
8	3
9	6
10	7
11	4
12	8
13	5
14	9
15	6
16	10
17	11
18	7
19	12
20	8
21	13
22	9
23	14
24	10
25	15
26	16
27	11
28	17
29	12
30	18
31	13
32	19
33	14
34	20
35	15
36	21
37	22
38	16
39	23
40	17
41	24
42	18
43	25
44	19
45	26
46	20
47	27
48	21
49	28
50	29
51	22
52	30
53	23
54	31
55	24
56	32
57	25
58	33
59	26
60	34
61	27
62	35
63	28
64	36
65	37
66	29
67	38
68	30
69	39
70	31
71	40
72	32
73	41
74	33
75	42