A213366 - cp's OEIS frontend

A213366 Minimal of max(m,k) (m>=1,k>=0) such that (2*n-1)!!/m-2^k is prime.

n	a(n)
2	1
3	1
4	1
5	2
6	2
7	2
8	1
9	1
10	1
11	5
12	3
13	2
14	6
15	5
16	3
17	5
18	2
19	3
20	3
21	3
22	3
23	5
24	5
25	3
26	1
27	7
28	5
29	8
30	7
31	3
32	5
33	5
34	5
35	5
36	7
37	1
38	9
39	7
40	2
41	2
42	3
43	3
44	7
45	1
46	3
47	10
48	7
49	5
50	4
51	11
52	9
53	2
54	9
55	7
56	9
57	9
58	13
59	13
60	9
61	3
62	9
63	5
64	12
65	7
66	1
67	5
68	7
69	5
70	9
71	6
72	3
73	5
74	5
75	11
76	10
77	1
78	5
79	5
80	7
81	3
82	3
83	3
84	8
85	9
86	2
87	6
88	7
89	4
90	7
91	9
92	5
93	4
94	6
95	7
96	5
97	10
98	15
99	4
100	9
101	11
102	15
103	9
104	21
105	13
106	7
107	11
108	7
109	8
110	7
111	8
112	12
113	7
114	4
115	12
116	5
117	7
118	20
119	9
120	5
121	21
122	2
123	1
124	3
125	9
126	5
127	13
128	16
129	13
130	9
131	4
132	15
133	11
134	13
135	5
136	2
137	9
138	7
139	11
140	11
141	11
142	17
143	9
144	8
145	9
146	15
147	15
148	2
149	12
150	3

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

cp's OEIS Frontend

A213366 Minimal of max(m,k) (m>=1,k>=0) such that (2*n-1)!!/m-2^k is prime.

Table of values

List of values

n	a(n)
2	1
3	1
4	1
5	2
6	2
7	2
8	1
9	1
10	1
11	5
12	3
13	2
14	6
15	5
16	3
17	5
18	2
19	3
20	3
21	3
22	3
23	5
24	5
25	3
26	1
27	7
28	5
29	8
30	7
31	3
32	5
33	5
34	5
35	5
36	7
37	1
38	9
39	7
40	2
41	2
42	3
43	3
44	7
45	1
46	3
47	10
48	7
49	5
50	4
51	11
52	9
53	2
54	9
55	7
56	9
57	9
58	13
59	13
60	9
61	3
62	9
63	5
64	12
65	7
66	1
67	5
68	7
69	5
70	9
71	6
72	3
73	5
74	5
75	11
76	10
77	1
78	5
79	5
80	7
81	3
82	3
83	3
84	8
85	9
86	2
87	6
88	7
89	4
90	7
91	9
92	5
93	4
94	6
95	7
96	5
97	10
98	15
99	4
100	9
101	11
102	15
103	9
104	21
105	13
106	7
107	11
108	7
109	8
110	7
111	8
112	12
113	7
114	4
115	12
116	5
117	7
118	20
119	9
120	5
121	21
122	2
123	1
124	3
125	9
126	5
127	13
128	16
129	13
130	9
131	4
132	15
133	11
134	13
135	5
136	2
137	9
138	7
139	11
140	11
141	11
142	17
143	9
144	8
145	9
146	15
147	15
148	2
149	12
150	3

n	a(n)
2	1
3	1
4	1
5	2
6	2
7	2
8	1
9	1
10	1
11	5
12	3
13	2
14	6
15	5
16	3
17	5
18	2
19	3
20	3
21	3
22	3
23	5
24	5
25	3
26	1
27	7
28	5
29	8
30	7
31	3
32	5
33	5
34	5
35	5
36	7
37	1
38	9
39	7
40	2
41	2
42	3
43	3
44	7
45	1
46	3
47	10
48	7
49	5
50	4
51	11
52	9
53	2
54	9
55	7
56	9
57	9
58	13
59	13
60	9
61	3
62	9
63	5
64	12
65	7
66	1
67	5
68	7
69	5
70	9
71	6
72	3
73	5
74	5
75	11
76	10
77	1
78	5
79	5
80	7
81	3
82	3
83	3
84	8
85	9
86	2
87	6
88	7
89	4
90	7
91	9
92	5
93	4
94	6
95	7
96	5
97	10
98	15
99	4
100	9
101	11
102	15
103	9
104	21
105	13
106	7
107	11
108	7
109	8
110	7
111	8
112	12
113	7
114	4
115	12
116	5
117	7
118	20
119	9
120	5
121	21
122	2
123	1
124	3
125	9
126	5
127	13
128	16
129	13
130	9
131	4
132	15
133	11
134	13
135	5
136	2
137	9
138	7
139	11
140	11
141	11
142	17
143	9
144	8
145	9
146	15
147	15
148	2
149	12
150	3

n	a(n)
2	1
3	1
4	1
5	2
6	2
7	2
8	1
9	1
10	1
11	5
12	3
13	2
14	6
15	5
16	3
17	5
18	2
19	3
20	3
21	3
22	3
23	5
24	5
25	3
26	1
27	7
28	5
29	8
30	7
31	3
32	5
33	5
34	5
35	5
36	7
37	1
38	9
39	7
40	2
41	2
42	3
43	3
44	7
45	1
46	3
47	10
48	7
49	5
50	4
51	11
52	9
53	2
54	9
55	7
56	9
57	9
58	13
59	13
60	9
61	3
62	9
63	5
64	12
65	7
66	1
67	5
68	7
69	5
70	9
71	6
72	3
73	5
74	5
75	11
76	10
77	1
78	5
79	5
80	7
81	3
82	3
83	3
84	8
85	9
86	2
87	6
88	7
89	4
90	7
91	9
92	5
93	4
94	6
95	7
96	5
97	10
98	15
99	4
100	9
101	11
102	15
103	9
104	21
105	13
106	7
107	11
108	7
109	8
110	7
111	8
112	12
113	7
114	4
115	12
116	5
117	7
118	20
119	9
120	5
121	21
122	2
123	1
124	3
125	9
126	5
127	13
128	16
129	13
130	9
131	4
132	15
133	11
134	13
135	5
136	2
137	9
138	7
139	11
140	11
141	11
142	17
143	9
144	8
145	9
146	15
147	15
148	2
149	12
150	3