A083403 - cp's OEIS frontend

A083403 Write the numbers 1, 2, ... in a triangle with n terms in the n-th row; a(n) = number of squarefree integers in n-th row.

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

[1, 2, 2, 2, 4, 3, 3, 6, 6, 5, 7, 8, 8, 8, 10, 8, 10, 11, 12, 13, 15, 11, 14, 14, 16, 14, 15, 19, 19, 19, 18, 20, 19, 21, 21, 22, 24, 21, 24, 26, 22, 27, 26, 26, 27, 27, 29, 30, 30, 31, 32, 32, 33, 32, 34, 35, 35, 33, 36, 34, 36, 37, 40, 37, 42, 40, 41, 43, 42, 44, 40, 45, 44, 46]

cp's OEIS Frontend

A083403 Write the numbers 1, 2, ... in a triangle with n terms in the n-th row; a(n) = number of squarefree integers in n-th row.

Table of values

List of values

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

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

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