A320014 - cp's OEIS frontend

A320014 Filter sequence combining the binary expansions of proper divisors of n, grouped by their residue classes mod 3.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	6
10	7
11	2
12	8
13	2
14	9
15	10
16	11
17	2
18	12
19	2
20	13
21	14
22	15
23	2
24	16
25	17
26	18
27	19
28	20
29	2
30	21
31	2
32	22
33	23
34	24
35	25
36	26
37	2
38	27
39	28
40	29
41	2
42	30
43	2
44	31
45	32
46	33
47	2
48	34
49	35
50	36
51	37
52	38
53	2
54	39
55	40
56	41
57	42
58	43
59	2
60	44
61	2
62	45
63	46
64	47
65	48
66	49
67	2
68	50
69	51
70	52
71	2
72	53
73	2
74	54
75	55
76	56
77	57
78	58
79	2
80	59
81	60
82	61
83	2
84	62
85	63
86	64
87	65
88	66
89	2
90	67
91	68
92	69
93	70
94	71
95	72
96	73
97	2
98	74
99	75

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

cp's OEIS Frontend

A320014 Filter sequence combining the binary expansions of proper divisors of n, grouped by their residue classes mod 3.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	6
10	7
11	2
12	8
13	2
14	9
15	10
16	11
17	2
18	12
19	2
20	13
21	14
22	15
23	2
24	16
25	17
26	18
27	19
28	20
29	2
30	21
31	2
32	22
33	23
34	24
35	25
36	26
37	2
38	27
39	28
40	29
41	2
42	30
43	2
44	31
45	32
46	33
47	2
48	34
49	35
50	36
51	37
52	38
53	2
54	39
55	40
56	41
57	42
58	43
59	2
60	44
61	2
62	45
63	46
64	47
65	48
66	49
67	2
68	50
69	51
70	52
71	2
72	53
73	2
74	54
75	55
76	56
77	57
78	58
79	2
80	59
81	60
82	61
83	2
84	62
85	63
86	64
87	65
88	66
89	2
90	67
91	68
92	69
93	70
94	71
95	72
96	73
97	2
98	74
99	75

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	6
10	7
11	2
12	8
13	2
14	9
15	10
16	11
17	2
18	12
19	2
20	13
21	14
22	15
23	2
24	16
25	17
26	18
27	19
28	20
29	2
30	21
31	2
32	22
33	23
34	24
35	25
36	26
37	2
38	27
39	28
40	29
41	2
42	30
43	2
44	31
45	32
46	33
47	2
48	34
49	35
50	36
51	37
52	38
53	2
54	39
55	40
56	41
57	42
58	43
59	2
60	44
61	2
62	45
63	46
64	47
65	48
66	49
67	2
68	50
69	51
70	52
71	2
72	53
73	2
74	54
75	55
76	56
77	57
78	58
79	2
80	59
81	60
82	61
83	2
84	62
85	63
86	64
87	65
88	66
89	2
90	67
91	68
92	69
93	70
94	71
95	72
96	73
97	2
98	74
99	75

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	4
7	2
8	5
9	6
10	7
11	2
12	8
13	2
14	9
15	10
16	11
17	2
18	12
19	2
20	13
21	14
22	15
23	2
24	16
25	17
26	18
27	19
28	20
29	2
30	21
31	2
32	22
33	23
34	24
35	25
36	26
37	2
38	27
39	28
40	29
41	2
42	30
43	2
44	31
45	32
46	33
47	2
48	34
49	35
50	36
51	37
52	38
53	2
54	39
55	40
56	41
57	42
58	43
59	2
60	44
61	2
62	45
63	46
64	47
65	48
66	49
67	2
68	50
69	51
70	52
71	2
72	53
73	2
74	54
75	55
76	56
77	57
78	58
79	2
80	59
81	60
82	61
83	2
84	62
85	63
86	64
87	65
88	66
89	2
90	67
91	68
92	69
93	70
94	71
95	72
96	73
97	2
98	74
99	75