A155904 - cp's OEIS frontend

A155904 Number of ways to write 2n-1 as p+2^x+5*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	0
7	0
8	1
9	2
10	2
11	2
12	2
13	4
14	3
15	5
16	6
17	4
18	5
19	4
20	4
21	6
22	5
23	6
24	7
25	7
26	5
27	7
28	11
29	5
30	10
31	8
32	5
33	10
34	7
35	5
36	8
37	8
38	7
39	6
40	10
41	6
42	8
43	13
44	9
45	12
46	10
47	8
48	14
49	10
50	7
51	13
52	12
53	7
54	10
55	10
56	9
57	10
58	17
59	8
60	11
61	11
62	9
63	16
64	12
65	7
66	13
67	8
68	10
69	7
70	8
71	10
72	11
73	14
74	5
75	14
76	14
77	10
78	17
79	12
80	7
81	11
82	12
83	10
84	12
85	10
86	12
87	13
88	17

[0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 4, 3, 5, 6, 4, 5, 4, 4, 6, 5, 6, 7, 7, 5, 7, 11, 5, 10, 8, 5, 10, 7, 5, 8, 8, 7, 6, 10, 6, 8, 13, 9, 12, 10, 8, 14, 10, 7, 13, 12, 7, 10, 10, 9, 10, 17, 8, 11, 11, 9, 16, 12, 7, 13, 8, 10, 7, 8, 10, 11, 14, 5, 14, 14, 10, 17, 12, 7, 11, 12, 10, 12, 10, 12, 13, 17]

cp's OEIS Frontend

A155904 Number of ways to write 2n-1 as p+2^x+5*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	0
7	0
8	1
9	2
10	2
11	2
12	2
13	4
14	3
15	5
16	6
17	4
18	5
19	4
20	4
21	6
22	5
23	6
24	7
25	7
26	5
27	7
28	11
29	5
30	10
31	8
32	5
33	10
34	7
35	5
36	8
37	8
38	7
39	6
40	10
41	6
42	8
43	13
44	9
45	12
46	10
47	8
48	14
49	10
50	7
51	13
52	12
53	7
54	10
55	10
56	9
57	10
58	17
59	8
60	11
61	11
62	9
63	16
64	12
65	7
66	13
67	8
68	10
69	7
70	8
71	10
72	11
73	14
74	5
75	14
76	14
77	10
78	17
79	12
80	7
81	11
82	12
83	10
84	12
85	10
86	12
87	13
88	17

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

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