A238224 - cp's OEIS frontend

A238224 Number of pairs {j, k} with 0 < j < k <= n and k == 1 (mod j) such that pi(jn) divides pi(kn), where pi(.) is given by A000720.

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	1
8	3
9	5
10	5
11	3
12	3
13	8
14	4
15	3
16	5
17	2
18	1
19	8
20	2
21	2
22	5
23	3
24	4
25	3
26	6
27	4
28	6
29	7
30	6
31	6
32	4
33	8
34	2
35	7
36	5
37	9
38	6
39	7
40	5
41	4
42	5
43	4
44	8
45	5
46	9
47	4
48	5
49	6
50	1
51	9
52	2
53	7
54	6
55	4
56	9
57	7
58	4
59	8
60	6
61	1
62	7
63	8
64	10
65	4
66	4
67	4
68	8
69	6
70	5
71	4
72	7
73	7
74	7
75	3
76	9
77	4
78	5
79	7
80	9

[0, 1, 1, 2, 2, 2, 1, 3, 5, 5, 3, 3, 8, 4, 3, 5, 2, 1, 8, 2, 2, 5, 3, 4, 3, 6, 4, 6, 7, 6, 6, 4, 8, 2, 7, 5, 9, 6, 7, 5, 4, 5, 4, 8, 5, 9, 4, 5, 6, 1, 9, 2, 7, 6, 4, 9, 7, 4, 8, 6, 1, 7, 8, 10, 4, 4, 4, 8, 6, 5, 4, 7, 7, 7, 3, 9, 4, 5, 7, 9]

cp's OEIS Frontend

A238224 Number of pairs {j, k} with 0 < j < k <= n and k == 1 (mod j) such that pi(jn) divides pi(kn), where pi(.) is given by A000720.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	1
8	3
9	5
10	5
11	3
12	3
13	8
14	4
15	3
16	5
17	2
18	1
19	8
20	2
21	2
22	5
23	3
24	4
25	3
26	6
27	4
28	6
29	7
30	6
31	6
32	4
33	8
34	2
35	7
36	5
37	9
38	6
39	7
40	5
41	4
42	5
43	4
44	8
45	5
46	9
47	4
48	5
49	6
50	1
51	9
52	2
53	7
54	6
55	4
56	9
57	7
58	4
59	8
60	6
61	1
62	7
63	8
64	10
65	4
66	4
67	4
68	8
69	6
70	5
71	4
72	7
73	7
74	7
75	3
76	9
77	4
78	5
79	7
80	9

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	1
8	3
9	5
10	5
11	3
12	3
13	8
14	4
15	3
16	5
17	2
18	1
19	8
20	2
21	2
22	5
23	3
24	4
25	3
26	6
27	4
28	6
29	7
30	6
31	6
32	4
33	8
34	2
35	7
36	5
37	9
38	6
39	7
40	5
41	4
42	5
43	4
44	8
45	5
46	9
47	4
48	5
49	6
50	1
51	9
52	2
53	7
54	6
55	4
56	9
57	7
58	4
59	8
60	6
61	1
62	7
63	8
64	10
65	4
66	4
67	4
68	8
69	6
70	5
71	4
72	7
73	7
74	7
75	3
76	9
77	4
78	5
79	7
80	9

cp's OEIS Frontend

A238224 Number of pairs {j, k} with 0 < j < k <= n and k == 1 (mod j) such that pi(j*n) divides pi(k*n), where pi(.) is given by A000720.

Table of values

List of values

A238224 Number of pairs {j, k} with 0 < j < k <= n and k == 1 (mod j) such that pi(jn) divides pi(kn), where pi(.) is given by A000720.

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	1
8	3
9	5
10	5
11	3
12	3
13	8
14	4
15	3
16	5
17	2
18	1
19	8
20	2
21	2
22	5
23	3
24	4
25	3
26	6
27	4
28	6
29	7
30	6
31	6
32	4
33	8
34	2
35	7
36	5
37	9
38	6
39	7
40	5
41	4
42	5
43	4
44	8
45	5
46	9
47	4
48	5
49	6
50	1
51	9
52	2
53	7
54	6
55	4
56	9
57	7
58	4
59	8
60	6
61	1
62	7
63	8
64	10
65	4
66	4
67	4
68	8
69	6
70	5
71	4
72	7
73	7
74	7
75	3
76	9
77	4
78	5
79	7
80	9