A344374 - cp's OEIS frontend

A344374 a(n) is the number of squarefree numbers appearing in the 1st column of an n X n square array whose elements are the numbers from 1..n^2, listed in increasing order by rows.

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

[1, 2, 2, 3, 4, 5, 5, 5, 7, 9, 7, 9, 9, 12, 10, 13, 11, 17, 12, 16, 15, 18, 14, 17, 17, 22, 19, 24, 17, 27, 18, 26, 23, 29, 22, 32, 24, 30, 27, 31, 27, 38, 28, 35, 32, 38, 29, 40, 31, 44, 37, 43, 32, 50, 36, 44, 40, 48, 36, 53, 35, 50, 44, 53, 42, 60, 41, 58, 47, 59, 45, 63, 45]

cp's OEIS Frontend

A344374 a(n) is the number of squarefree numbers appearing in the 1st column of an n X n square array whose elements are the numbers from 1..n^2, listed in increasing order by rows.

Table of values

List of values

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

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

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