A343070 - cp's OEIS frontend

A343070 a(1) = 1, for n > 1, a(n) is the smallest positive integer for which a(n-1) + n + a(n) is a prime.

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

[1, 2, 2, 1, 1, 4, 2, 1, 1, 2, 4, 1, 3, 2, 2, 1, 1, 4, 6, 3, 5, 2, 4, 1, 3, 2, 2, 1, 1, 6, 4, 1, 3, 4, 2, 3, 1, 2, 2, 1, 1, 4, 6, 3, 5, 2, 4, 1, 3, 6, 2, 5, 1, 4, 2, 1, 1, 2, 6, 1, 5, 4, 4, 3, 3, 2, 2, 1, 1, 2, 6, 1, 5, 4, 4, 3, 3, 2, 2, 1, 1, 6, 8]

cp's OEIS Frontend

A343070 a(1) = 1, for n > 1, a(n) is the smallest positive integer for which a(n-1) + n + a(n) is a prime.

Table of values

List of values

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

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

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