A065883 - cp's OEIS frontend

A065883 Remove factors of 4 from n (i.e., write n in base 4, drop final zeros, then rewrite in decimal).

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

[1, 2, 3, 1, 5, 6, 7, 2, 9, 10, 11, 3, 13, 14, 15, 1, 17, 18, 19, 5, 21, 22, 23, 6, 25, 26, 27, 7, 29, 30, 31, 2, 33, 34, 35, 9, 37, 38, 39, 10, 41, 42, 43, 11, 45, 46, 47, 3, 49, 50, 51, 13, 53, 54, 55, 14, 57, 58, 59, 15, 61, 62, 63, 1, 65, 66, 67, 17, 69, 70, 71, 18, 73, 74, 75]

cp's OEIS Frontend

A065883 Remove factors of 4 from n (i.e., write n in base 4, drop final zeros, then rewrite in decimal).

Table of values

List of values

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

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

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