A181483 - cp's OEIS frontend

A181483 Number of powers of 2 which can be subtracted from 3^n to form primes.

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	2
7	4
8	3
9	4
10	3
11	5
12	1
13	3
14	2
15	3
16	4
17	4
18	1
19	5
20	2
21	6
22	4
23	2
24	1
25	4
26	1
27	5
28	2
29	8
30	1
31	6
32	1
33	5
34	3
35	7
36	0
37	6
38	3
39	1
40	0
41	9
42	1
43	8
44	8
45	5
46	1
47	4
48	4
49	6
50	1
51	6
52	1
53	4
54	3
55	5
56	3
57	2
58	2
59	4
60	2
61	2
62	3
63	3
64	5
65	2
66	0
67	7
68	1
69	5
70	2
71	3
72	4
73	5
74	2
75	1
76	4
77	5
78	1
79	4
80	1
81	4
82	5
83	4
84	3
85	4
86	2
87	6
88	1
89	9
90	3
91	3
92	2
93	2
94	2
95	5
96	2
97	3
98	1
99	5
100	1
101	6
102	3
103	1
104	5
105	4

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

cp's OEIS Frontend

A181483 Number of powers of 2 which can be subtracted from 3^n to form primes.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	2
7	4
8	3
9	4
10	3
11	5
12	1
13	3
14	2
15	3
16	4
17	4
18	1
19	5
20	2
21	6
22	4
23	2
24	1
25	4
26	1
27	5
28	2
29	8
30	1
31	6
32	1
33	5
34	3
35	7
36	0
37	6
38	3
39	1
40	0
41	9
42	1
43	8
44	8
45	5
46	1
47	4
48	4
49	6
50	1
51	6
52	1
53	4
54	3
55	5
56	3
57	2
58	2
59	4
60	2
61	2
62	3
63	3
64	5
65	2
66	0
67	7
68	1
69	5
70	2
71	3
72	4
73	5
74	2
75	1
76	4
77	5
78	1
79	4
80	1
81	4
82	5
83	4
84	3
85	4
86	2
87	6
88	1
89	9
90	3
91	3
92	2
93	2
94	2
95	5
96	2
97	3
98	1
99	5
100	1
101	6
102	3
103	1
104	5
105	4

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	2
7	4
8	3
9	4
10	3
11	5
12	1
13	3
14	2
15	3
16	4
17	4
18	1
19	5
20	2
21	6
22	4
23	2
24	1
25	4
26	1
27	5
28	2
29	8
30	1
31	6
32	1
33	5
34	3
35	7
36	0
37	6
38	3
39	1
40	0
41	9
42	1
43	8
44	8
45	5
46	1
47	4
48	4
49	6
50	1
51	6
52	1
53	4
54	3
55	5
56	3
57	2
58	2
59	4
60	2
61	2
62	3
63	3
64	5
65	2
66	0
67	7
68	1
69	5
70	2
71	3
72	4
73	5
74	2
75	1
76	4
77	5
78	1
79	4
80	1
81	4
82	5
83	4
84	3
85	4
86	2
87	6
88	1
89	9
90	3
91	3
92	2
93	2
94	2
95	5
96	2
97	3
98	1
99	5
100	1
101	6
102	3
103	1
104	5
105	4

n	a(n)
1	1
2	2
3	3
4	3
5	5
6	2
7	4
8	3
9	4
10	3
11	5
12	1
13	3
14	2
15	3
16	4
17	4
18	1
19	5
20	2
21	6
22	4
23	2
24	1
25	4
26	1
27	5
28	2
29	8
30	1
31	6
32	1
33	5
34	3
35	7
36	0
37	6
38	3
39	1
40	0
41	9
42	1
43	8
44	8
45	5
46	1
47	4
48	4
49	6
50	1
51	6
52	1
53	4
54	3
55	5
56	3
57	2
58	2
59	4
60	2
61	2
62	3
63	3
64	5
65	2
66	0
67	7
68	1
69	5
70	2
71	3
72	4
73	5
74	2
75	1
76	4
77	5
78	1
79	4
80	1
81	4
82	5
83	4
84	3
85	4
86	2
87	6
88	1
89	9
90	3
91	3
92	2
93	2
94	2
95	5
96	2
97	3
98	1
99	5
100	1
101	6
102	3
103	1
104	5
105	4