A159270 - cp's OEIS frontend

A159270 Number of positive integers m<=n such that 2^m+3^n or 2^n+3^m is prime.

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	5
9	3
10	5
11	3
12	6
13	6
14	4
15	4
16	7
17	6
18	8
19	4
20	4
21	4
22	4
23	6
24	7
25	2
26	4
27	5
28	6
29	6
30	8
31	6
32	10
33	3
34	3
35	5
36	6
37	4
38	9
39	6
40	9
41	7
42	5
43	5
44	9
45	6
46	8
47	7
48	7
49	10
50	4
51	5
52	8
53	9
54	1
55	8
56	6
57	6
58	7
59	7
60	10
61	5
62	5
63	4
64	10
65	8
66	7
67	8
68	8
69	2
70	3
71	8
72	8
73	8
74	5
75	6
76	7
77	5
78	10
79	6
80	7
81	7
82	8
83	10
84	10
85	9
86	10
87	5
88	7
89	5
90	5
91	6
92	9
93	6
94	5
95	5
96	12
97	3
98	7
99	6
100	8
101	9

[0, 1, 2, 2, 3, 3, 3, 4, 5, 3, 5, 3, 6, 6, 4, 4, 7, 6, 8, 4, 4, 4, 4, 6, 7, 2, 4, 5, 6, 6, 8, 6, 10, 3, 3, 5, 6, 4, 9, 6, 9, 7, 5, 5, 9, 6, 8, 7, 7, 10, 4, 5, 8, 9, 1, 8, 6, 6, 7, 7, 10, 5, 5, 4, 10, 8, 7, 8, 8, 2, 3, 8, 8, 8, 5, 6, 7, 5, 10, 6, 7, 7, 8, 10, 10, 9, 10, 5, 7, 5, 5, 6, 9, 6, 5, 5, 12, 3, 7, 6, 8, 9]

cp's OEIS Frontend

A159270 Number of positive integers m<=n such that 2^m+3^n or 2^n+3^m is prime.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	5
9	3
10	5
11	3
12	6
13	6
14	4
15	4
16	7
17	6
18	8
19	4
20	4
21	4
22	4
23	6
24	7
25	2
26	4
27	5
28	6
29	6
30	8
31	6
32	10
33	3
34	3
35	5
36	6
37	4
38	9
39	6
40	9
41	7
42	5
43	5
44	9
45	6
46	8
47	7
48	7
49	10
50	4
51	5
52	8
53	9
54	1
55	8
56	6
57	6
58	7
59	7
60	10
61	5
62	5
63	4
64	10
65	8
66	7
67	8
68	8
69	2
70	3
71	8
72	8
73	8
74	5
75	6
76	7
77	5
78	10
79	6
80	7
81	7
82	8
83	10
84	10
85	9
86	10
87	5
88	7
89	5
90	5
91	6
92	9
93	6
94	5
95	5
96	12
97	3
98	7
99	6
100	8
101	9

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	5
9	3
10	5
11	3
12	6
13	6
14	4
15	4
16	7
17	6
18	8
19	4
20	4
21	4
22	4
23	6
24	7
25	2
26	4
27	5
28	6
29	6
30	8
31	6
32	10
33	3
34	3
35	5
36	6
37	4
38	9
39	6
40	9
41	7
42	5
43	5
44	9
45	6
46	8
47	7
48	7
49	10
50	4
51	5
52	8
53	9
54	1
55	8
56	6
57	6
58	7
59	7
60	10
61	5
62	5
63	4
64	10
65	8
66	7
67	8
68	8
69	2
70	3
71	8
72	8
73	8
74	5
75	6
76	7
77	5
78	10
79	6
80	7
81	7
82	8
83	10
84	10
85	9
86	10
87	5
88	7
89	5
90	5
91	6
92	9
93	6
94	5
95	5
96	12
97	3
98	7
99	6
100	8
101	9

n	a(n)
0	0
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	5
9	3
10	5
11	3
12	6
13	6
14	4
15	4
16	7
17	6
18	8
19	4
20	4
21	4
22	4
23	6
24	7
25	2
26	4
27	5
28	6
29	6
30	8
31	6
32	10
33	3
34	3
35	5
36	6
37	4
38	9
39	6
40	9
41	7
42	5
43	5
44	9
45	6
46	8
47	7
48	7
49	10
50	4
51	5
52	8
53	9
54	1
55	8
56	6
57	6
58	7
59	7
60	10
61	5
62	5
63	4
64	10
65	8
66	7
67	8
68	8
69	2
70	3
71	8
72	8
73	8
74	5
75	6
76	7
77	5
78	10
79	6
80	7
81	7
82	8
83	10
84	10
85	9
86	10
87	5
88	7
89	5
90	5
91	6
92	9
93	6
94	5
95	5
96	12
97	3
98	7
99	6
100	8
101	9