A028236 - cp's OEIS frontend

A028236 If n = Product (p_j^k_j), a(n) = numerator of Sum 1/p_j^k_j.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	5
7	1
8	1
9	1
10	7
11	1
12	7
13	1
14	9
15	8
16	1
17	1
18	11
19	1
20	9
21	10
22	13
23	1
24	11
25	1
26	15
27	1
28	11
29	1
30	31
31	1
32	1
33	14
34	19
35	12
36	13
37	1
38	21
39	16
40	13
41	1
42	41
43	1
44	15
45	14
46	25
47	1
48	19
49	1
50	27
51	20
52	17
53	1
54	29
55	16
56	15
57	22
58	31
59	1
60	47
61	1
62	33
63	16
64	1
65	18
66	61
67	1
68	21
69	26
70	59
71	1
72	17
73	1
74	39
75	28
76	23
77	18
78	71
79	1
80	21
81	1
82	43

[1, 1, 1, 1, 1, 5, 1, 1, 1, 7, 1, 7, 1, 9, 8, 1, 1, 11, 1, 9, 10, 13, 1, 11, 1, 15, 1, 11, 1, 31, 1, 1, 14, 19, 12, 13, 1, 21, 16, 13, 1, 41, 1, 15, 14, 25, 1, 19, 1, 27, 20, 17, 1, 29, 16, 15, 22, 31, 1, 47, 1, 33, 16, 1, 18, 61, 1, 21, 26, 59, 1, 17, 1, 39, 28, 23, 18, 71, 1, 21, 1, 43]

cp's OEIS Frontend

A028236 If n = Product (p_j^k_j), a(n) = numerator of Sum 1/p_j^k_j.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	5
7	1
8	1
9	1
10	7
11	1
12	7
13	1
14	9
15	8
16	1
17	1
18	11
19	1
20	9
21	10
22	13
23	1
24	11
25	1
26	15
27	1
28	11
29	1
30	31
31	1
32	1
33	14
34	19
35	12
36	13
37	1
38	21
39	16
40	13
41	1
42	41
43	1
44	15
45	14
46	25
47	1
48	19
49	1
50	27
51	20
52	17
53	1
54	29
55	16
56	15
57	22
58	31
59	1
60	47
61	1
62	33
63	16
64	1
65	18
66	61
67	1
68	21
69	26
70	59
71	1
72	17
73	1
74	39
75	28
76	23
77	18
78	71
79	1
80	21
81	1
82	43

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	5
7	1
8	1
9	1
10	7
11	1
12	7
13	1
14	9
15	8
16	1
17	1
18	11
19	1
20	9
21	10
22	13
23	1
24	11
25	1
26	15
27	1
28	11
29	1
30	31
31	1
32	1
33	14
34	19
35	12
36	13
37	1
38	21
39	16
40	13
41	1
42	41
43	1
44	15
45	14
46	25
47	1
48	19
49	1
50	27
51	20
52	17
53	1
54	29
55	16
56	15
57	22
58	31
59	1
60	47
61	1
62	33
63	16
64	1
65	18
66	61
67	1
68	21
69	26
70	59
71	1
72	17
73	1
74	39
75	28
76	23
77	18
78	71
79	1
80	21
81	1
82	43

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	5
7	1
8	1
9	1
10	7
11	1
12	7
13	1
14	9
15	8
16	1
17	1
18	11
19	1
20	9
21	10
22	13
23	1
24	11
25	1
26	15
27	1
28	11
29	1
30	31
31	1
32	1
33	14
34	19
35	12
36	13
37	1
38	21
39	16
40	13
41	1
42	41
43	1
44	15
45	14
46	25
47	1
48	19
49	1
50	27
51	20
52	17
53	1
54	29
55	16
56	15
57	22
58	31
59	1
60	47
61	1
62	33
63	16
64	1
65	18
66	61
67	1
68	21
69	26
70	59
71	1
72	17
73	1
74	39
75	28
76	23
77	18
78	71
79	1
80	21
81	1
82	43