A350628 - cp's OEIS frontend

A350628 Number of ways to write 2*n as 3^i (i >= 1) plus a prime.

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

[0, 0, 1, 1, 1, 1, 2, 2, 0, 2, 2, 0, 2, 1, 1, 3, 2, 0, 2, 3, 0, 2, 3, 0, 3, 1, 0, 3, 1, 0, 2, 2, 0, 2, 3, 0, 2, 2, 0, 2, 2, 1, 3, 3, 0, 3, 2, 0, 3, 3, 0, 2, 3, 0, 4, 3, 0, 3, 2, 0, 2, 2, 0, 2, 2, 0, 3, 2, 0, 4, 2, 0, 1, 2, 0, 2, 3, 0, 2, 3, 0, 2, 3, 0, 2, 1, 0, 3, 2, 0, 3, 3, 0, 2, 3]

cp's OEIS Frontend

A350628 Number of ways to write 2*n as 3^i (i >= 1) plus a prime.

Table of values

List of values

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

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

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