A155860 - cp's OEIS frontend

A155860 Number of ways to write 2n-1 as p + 2^x + 3*2^y with p an odd prime and x,y positive integers.

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

[0, 0, 0, 0, 0, 1, 2, 2, 3, 4, 5, 3, 5, 7, 4, 7, 9, 5, 6, 9, 5, 7, 11, 6, 6, 12, 5, 9, 13, 8, 10, 12, 4, 11, 15, 6, 10, 15, 5, 9, 16, 9, 9, 17, 8, 8, 17, 8, 10, 16, 8, 11, 13, 10, 10, 20, 7, 12, 23, 10, 10, 21, 9, 11, 18, 11, 8, 18, 9, 11, 20, 9, 13, 17, 9, 12, 19, 9, 13, 22, 6, 13, 21, 10, 10, 21]

cp's OEIS Frontend

A155860 Number of ways to write 2n-1 as p + 2^x + 3*2^y with p an odd prime and x,y positive integers.

Table of values

List of values

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

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

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