A235431 - cp's OEIS frontend

A235431 The smallest positive number that must be added to or subtracted from the sum of the first n primes in order to get a prime.

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	1
8	2
9	1
10	2
11	3
12	2
13	1
14	2
15	3
16	2
17	1
18	2
19	1
20	2
21	3
22	4
23	3
24	4
25	1
26	2
27	5
28	2
29	1
30	4
31	1
32	4
33	1
34	2
35	3
36	4
37	5
38	2
39	3
40	2
41	5
42	2
43	1
44	2
45	1
46	2
47	3
48	2
49	1
50	2
51	1
52	2
53	3
54	2
55	1
56	2
57	1
58	10
59	1
60	4
61	11
62	2
63	1
64	6

[1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 4, 3, 4, 1, 2, 5, 2, 1, 4, 1, 4, 1, 2, 3, 4, 5, 2, 3, 2, 5, 2, 1, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 2, 1, 2, 1, 10, 1, 4, 11, 2, 1, 6]

cp's OEIS Frontend

A235431 The smallest positive number that must be added to or subtracted from the sum of the first n primes in order to get a prime.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	1
8	2
9	1
10	2
11	3
12	2
13	1
14	2
15	3
16	2
17	1
18	2
19	1
20	2
21	3
22	4
23	3
24	4
25	1
26	2
27	5
28	2
29	1
30	4
31	1
32	4
33	1
34	2
35	3
36	4
37	5
38	2
39	3
40	2
41	5
42	2
43	1
44	2
45	1
46	2
47	3
48	2
49	1
50	2
51	1
52	2
53	3
54	2
55	1
56	2
57	1
58	10
59	1
60	4
61	11
62	2
63	1
64	6

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	1
8	2
9	1
10	2
11	3
12	2
13	1
14	2
15	3
16	2
17	1
18	2
19	1
20	2
21	3
22	4
23	3
24	4
25	1
26	2
27	5
28	2
29	1
30	4
31	1
32	4
33	1
34	2
35	3
36	4
37	5
38	2
39	3
40	2
41	5
42	2
43	1
44	2
45	1
46	2
47	3
48	2
49	1
50	2
51	1
52	2
53	3
54	2
55	1
56	2
57	1
58	10
59	1
60	4
61	11
62	2
63	1
64	6

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	1
8	2
9	1
10	2
11	3
12	2
13	1
14	2
15	3
16	2
17	1
18	2
19	1
20	2
21	3
22	4
23	3
24	4
25	1
26	2
27	5
28	2
29	1
30	4
31	1
32	4
33	1
34	2
35	3
36	4
37	5
38	2
39	3
40	2
41	5
42	2
43	1
44	2
45	1
46	2
47	3
48	2
49	1
50	2
51	1
52	2
53	3
54	2
55	1
56	2
57	1
58	10
59	1
60	4
61	11
62	2
63	1
64	6