A087620 - cp's OEIS frontend

A087620 #{0<=k<=n: k*n is divisible by 4}.

n	a(n)
0	1
1	1
2	2
3	1
4	5
5	2
6	4
7	2
8	9
9	3
10	6
11	3
12	13
13	4
14	8
15	4
16	17
17	5
18	10
19	5
20	21
21	6
22	12
23	6
24	25
25	7
26	14
27	7
28	29
29	8
30	16
31	8
32	33
33	9
34	18
35	9
36	37
37	10
38	20
39	10
40	41
41	11
42	22
43	11
44	45
45	12
46	24
47	12
48	49
49	13
50	26
51	13
52	53
53	14
54	28
55	14
56	57
57	15
58	30
59	15
60	61
61	16
62	32
63	16
64	65
65	17
66	34
67	17
68	69
69	18
70	36
71	18
72	73
73	19
74	38
75	19
76	77
77	20

[1, 1, 2, 1, 5, 2, 4, 2, 9, 3, 6, 3, 13, 4, 8, 4, 17, 5, 10, 5, 21, 6, 12, 6, 25, 7, 14, 7, 29, 8, 16, 8, 33, 9, 18, 9, 37, 10, 20, 10, 41, 11, 22, 11, 45, 12, 24, 12, 49, 13, 26, 13, 53, 14, 28, 14, 57, 15, 30, 15, 61, 16, 32, 16, 65, 17, 34, 17, 69, 18, 36, 18, 73, 19, 38, 19, 77, 20]

cp's OEIS Frontend

A087620 #{0<=k<=n: k*n is divisible by 4}.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	1
4	5
5	2
6	4
7	2
8	9
9	3
10	6
11	3
12	13
13	4
14	8
15	4
16	17
17	5
18	10
19	5
20	21
21	6
22	12
23	6
24	25
25	7
26	14
27	7
28	29
29	8
30	16
31	8
32	33
33	9
34	18
35	9
36	37
37	10
38	20
39	10
40	41
41	11
42	22
43	11
44	45
45	12
46	24
47	12
48	49
49	13
50	26
51	13
52	53
53	14
54	28
55	14
56	57
57	15
58	30
59	15
60	61
61	16
62	32
63	16
64	65
65	17
66	34
67	17
68	69
69	18
70	36
71	18
72	73
73	19
74	38
75	19
76	77
77	20

n	a(n)
0	1
1	1
2	2
3	1
4	5
5	2
6	4
7	2
8	9
9	3
10	6
11	3
12	13
13	4
14	8
15	4
16	17
17	5
18	10
19	5
20	21
21	6
22	12
23	6
24	25
25	7
26	14
27	7
28	29
29	8
30	16
31	8
32	33
33	9
34	18
35	9
36	37
37	10
38	20
39	10
40	41
41	11
42	22
43	11
44	45
45	12
46	24
47	12
48	49
49	13
50	26
51	13
52	53
53	14
54	28
55	14
56	57
57	15
58	30
59	15
60	61
61	16
62	32
63	16
64	65
65	17
66	34
67	17
68	69
69	18
70	36
71	18
72	73
73	19
74	38
75	19
76	77
77	20

n	a(n)
0	1
1	1
2	2
3	1
4	5
5	2
6	4
7	2
8	9
9	3
10	6
11	3
12	13
13	4
14	8
15	4
16	17
17	5
18	10
19	5
20	21
21	6
22	12
23	6
24	25
25	7
26	14
27	7
28	29
29	8
30	16
31	8
32	33
33	9
34	18
35	9
36	37
37	10
38	20
39	10
40	41
41	11
42	22
43	11
44	45
45	12
46	24
47	12
48	49
49	13
50	26
51	13
52	53
53	14
54	28
55	14
56	57
57	15
58	30
59	15
60	61
61	16
62	32
63	16
64	65
65	17
66	34
67	17
68	69
69	18
70	36
71	18
72	73
73	19
74	38
75	19
76	77
77	20