A055231 - cp's OEIS frontend

A055231 Powerfree part of n: product of primes that divide n only once.

n	a(n)
1	1
2	2
3	3
4	1
5	5
6	6
7	7
8	1
9	1
10	10
11	11
12	3
13	13
14	14
15	15
16	1
17	17
18	2
19	19
20	5
21	21
22	22
23	23
24	3
25	1
26	26
27	1
28	7
29	29
30	30
31	31
32	1
33	33
34	34
35	35
36	1
37	37
38	38
39	39
40	5
41	41
42	42
43	43
44	11
45	5
46	46
47	47
48	3
49	1
50	2
51	51
52	13
53	53
54	2
55	55
56	7
57	57
58	58
59	59
60	15
61	61
62	62
63	7
64	1
65	65
66	66
67	67
68	17
69	69
70	70
71	71
72	1
73	73
74	74
75	3
76	19
77	77
78	78
79	79
80	5

[1, 2, 3, 1, 5, 6, 7, 1, 1, 10, 11, 3, 13, 14, 15, 1, 17, 2, 19, 5, 21, 22, 23, 3, 1, 26, 1, 7, 29, 30, 31, 1, 33, 34, 35, 1, 37, 38, 39, 5, 41, 42, 43, 11, 5, 46, 47, 3, 1, 2, 51, 13, 53, 2, 55, 7, 57, 58, 59, 15, 61, 62, 7, 1, 65, 66, 67, 17, 69, 70, 71, 1, 73, 74, 3, 19, 77, 78, 79, 5]

cp's OEIS Frontend

A055231 Powerfree part of n: product of primes that divide n only once.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	1
5	5
6	6
7	7
8	1
9	1
10	10
11	11
12	3
13	13
14	14
15	15
16	1
17	17
18	2
19	19
20	5
21	21
22	22
23	23
24	3
25	1
26	26
27	1
28	7
29	29
30	30
31	31
32	1
33	33
34	34
35	35
36	1
37	37
38	38
39	39
40	5
41	41
42	42
43	43
44	11
45	5
46	46
47	47
48	3
49	1
50	2
51	51
52	13
53	53
54	2
55	55
56	7
57	57
58	58
59	59
60	15
61	61
62	62
63	7
64	1
65	65
66	66
67	67
68	17
69	69
70	70
71	71
72	1
73	73
74	74
75	3
76	19
77	77
78	78
79	79
80	5

n	a(n)
1	1
2	2
3	3
4	1
5	5
6	6
7	7
8	1
9	1
10	10
11	11
12	3
13	13
14	14
15	15
16	1
17	17
18	2
19	19
20	5
21	21
22	22
23	23
24	3
25	1
26	26
27	1
28	7
29	29
30	30
31	31
32	1
33	33
34	34
35	35
36	1
37	37
38	38
39	39
40	5
41	41
42	42
43	43
44	11
45	5
46	46
47	47
48	3
49	1
50	2
51	51
52	13
53	53
54	2
55	55
56	7
57	57
58	58
59	59
60	15
61	61
62	62
63	7
64	1
65	65
66	66
67	67
68	17
69	69
70	70
71	71
72	1
73	73
74	74
75	3
76	19
77	77
78	78
79	79
80	5

n	a(n)
1	1
2	2
3	3
4	1
5	5
6	6
7	7
8	1
9	1
10	10
11	11
12	3
13	13
14	14
15	15
16	1
17	17
18	2
19	19
20	5
21	21
22	22
23	23
24	3
25	1
26	26
27	1
28	7
29	29
30	30
31	31
32	1
33	33
34	34
35	35
36	1
37	37
38	38
39	39
40	5
41	41
42	42
43	43
44	11
45	5
46	46
47	47
48	3
49	1
50	2
51	51
52	13
53	53
54	2
55	55
56	7
57	57
58	58
59	59
60	15
61	61
62	62
63	7
64	1
65	65
66	66
67	67
68	17
69	69
70	70
71	71
72	1
73	73
74	74
75	3
76	19
77	77
78	78
79	79
80	5