A076144 - cp's OEIS frontend

A076144 Largest squarefree m <= sfn(n) such that m*sfn(n) is also squarefree, where sfn(n) is the n-th squarefree number.

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	6
7	7
8	10
9	11
10	13
11	14
12	15
13	17
14	19
15	21
16	22
17	23
18	26
19	29
20	30
21	31
22	33
23	34
24	35
25	37
26	38
27	39
28	41
29	42
30	43
31	46
32	47
33	51
34	53
35	55
36	57
37	58
38	59
39	61
40	62
41	65
42	66
43	67
44	69
45	70
46	71
47	73
48	74
49	77
50	78
51	79
52	82
53	83
54	85
55	86
56	87
57	89
58	91
59	93
60	94
61	95
62	97
63	101
64	102
65	103
66	105
67	106
68	107
69	109

[1, 1, 2, 3, 5, 6, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 26, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 46, 47, 51, 53, 55, 57, 58, 59, 61, 62, 65, 66, 67, 69, 70, 71, 73, 74, 77, 78, 79, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 102, 103, 105, 106, 107, 109]

cp's OEIS Frontend

A076144 Largest squarefree m <= sfn(n) such that m*sfn(n) is also squarefree, where sfn(n) is the n-th squarefree number.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	6
7	7
8	10
9	11
10	13
11	14
12	15
13	17
14	19
15	21
16	22
17	23
18	26
19	29
20	30
21	31
22	33
23	34
24	35
25	37
26	38
27	39
28	41
29	42
30	43
31	46
32	47
33	51
34	53
35	55
36	57
37	58
38	59
39	61
40	62
41	65
42	66
43	67
44	69
45	70
46	71
47	73
48	74
49	77
50	78
51	79
52	82
53	83
54	85
55	86
56	87
57	89
58	91
59	93
60	94
61	95
62	97
63	101
64	102
65	103
66	105
67	106
68	107
69	109

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	6
7	7
8	10
9	11
10	13
11	14
12	15
13	17
14	19
15	21
16	22
17	23
18	26
19	29
20	30
21	31
22	33
23	34
24	35
25	37
26	38
27	39
28	41
29	42
30	43
31	46
32	47
33	51
34	53
35	55
36	57
37	58
38	59
39	61
40	62
41	65
42	66
43	67
44	69
45	70
46	71
47	73
48	74
49	77
50	78
51	79
52	82
53	83
54	85
55	86
56	87
57	89
58	91
59	93
60	94
61	95
62	97
63	101
64	102
65	103
66	105
67	106
68	107
69	109

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	6
7	7
8	10
9	11
10	13
11	14
12	15
13	17
14	19
15	21
16	22
17	23
18	26
19	29
20	30
21	31
22	33
23	34
24	35
25	37
26	38
27	39
28	41
29	42
30	43
31	46
32	47
33	51
34	53
35	55
36	57
37	58
38	59
39	61
40	62
41	65
42	66
43	67
44	69
45	70
46	71
47	73
48	74
49	77
50	78
51	79
52	82
53	83
54	85
55	86
56	87
57	89
58	91
59	93
60	94
61	95
62	97
63	101
64	102
65	103
66	105
67	106
68	107
69	109