A238393 - cp's OEIS frontend

A238393 a(n) = |{0 < k <= n: 2p(k)p(n) + 1 is prime}|, where p(.) is the partition function (A000041).

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

[1, 1, 3, 2, 3, 2, 5, 2, 6, 3, 3, 5, 1, 9, 3, 4, 5, 5, 6, 2, 7, 3, 5, 8, 3, 4, 8, 10, 7, 10, 6, 7, 9, 8, 8, 6, 6, 4, 12, 10, 10, 8, 6, 6, 5, 7, 8, 6, 10, 5, 9, 9, 11, 7, 7, 6, 9, 11, 8, 7, 11, 6, 9, 8, 4, 8, 5, 18, 14, 10, 9, 7, 8, 6, 13, 9, 4, 7, 7, 15]

cp's OEIS Frontend

A238393 a(n) = |{0 < k <= n: 2p(k)p(n) + 1 is prime}|, where p(.) is the partition function (A000041).

Table of values

List of values

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

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

cp's OEIS Frontend

A238393 a(n) = |{0 < k <= n: 2*p(k)*p(n) + 1 is prime}|, where p(.) is the partition function (A000041).

Table of values

List of values

A238393 a(n) = |{0 < k <= n: 2p(k)p(n) + 1 is prime}|, where p(.) is the partition function (A000041).

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