A117673 - cp's OEIS frontend

A117673 a(n) is the least k such that k2prime(n) + 1 is prime.

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

[1, 1, 1, 2, 1, 2, 3, 5, 1, 1, 5, 2, 1, 2, 3, 1, 6, 3, 2, 4, 2, 2, 1, 1, 2, 3, 3, 3, 5, 1, 2, 1, 3, 2, 4, 3, 5, 2, 7, 1, 1, 3, 1, 2, 9, 2, 5, 6, 12, 6, 1, 1, 3, 1, 3, 3, 4, 3, 2, 1, 3, 1, 2, 3, 3, 13, 3, 5, 3, 5, 7, 1, 3, 2, 6, 6, 12, 3, 4, 2, 1, 5, 1, 2, 5, 1, 4, 15, 3, 6, 3, 4, 2, 1, 2, 3, 1, 16, 5, 9]

cp's OEIS Frontend

A117673 a(n) is the least k such that k2prime(n) + 1 is prime.

Table of values

List of values

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

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

cp's OEIS Frontend

A117673 a(n) is the least k such that k*2*prime(n) + 1 is prime.

Table of values

List of values

A117673 a(n) is the least k such that k2prime(n) + 1 is prime.

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