A173229 - cp's OEIS frontend

A173229 a(n) is the n-th number m such that 6m-1 is composite minus the n-th number k such that 6k+1 is composite.

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

[2, 3, 4, 2, 5, 2, 4, 4, 3, 3, 5, 4, 2, 1, 2, 5, 6, 7, 7, 6, 6, 6, 4, 7, 5, 4, 6, 4, 4, 4, 4, 5, 5, 6, 5, 7, 8, 7, 6, 6, 6, 8, 8, 9, 9, 10, 8, 8, 12, 8, 9, 8, 9, 8, 8, 8, 7, 8, 7, 8, 6, 4, 3, 4, 4, 6, 7, 6, 6, 6, 8, 6, 6, 5, 5, 6, 8, 7, 10, 9, 9, 9, 11, 11, 11, 12, 11, 10, 9, 7, 10, 8, 8, 6, 6, 6, 4, 5, 5, 7]

cp's OEIS Frontend

A173229 a(n) is the n-th number m such that 6m-1 is composite minus the n-th number k such that 6k+1 is composite.

Table of values

List of values

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

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

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