A083058 - cp's OEIS frontend

A083058 Number of eigenvalues equal to 1 of n X n matrix A(i,j)=1 if j=1 or i divides j.

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

[1, 0, 1, 1, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66]

cp's OEIS Frontend

A083058 Number of eigenvalues equal to 1 of n X n matrix A(i,j)=1 if j=1 or i divides j.

Table of values

List of values

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

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

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