A060362 - cp's OEIS frontend

A060362 a(n) = Min { { smallest prime > k } - k, k - { largest prime < k } }, where k = lcm(1..n) = A003418(n).

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	13
12	13
13	23
14	23
15	23
16	17
17	19
18	19
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	31
28	31
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	43
38	43
39	43
40	43
41	47
42	47
43	59
44	59
45	59
46	59
47	1
48	1
49	59
50	59
51	59
52	59
53	61
54	61
55	61
56	61
57	61
58	61
59	113
60	113
61	1
62	1
63	1
64	97
65	97
66	97
67	73
68	73
69	73
70	73
71	73
72	73
73	97

[1, 1, 1, 1, 1, 1, 1, 1, 13, 13, 23, 23, 23, 17, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 43, 43, 43, 43, 47, 47, 59, 59, 59, 59, 1, 1, 59, 59, 59, 59, 61, 61, 61, 61, 61, 61, 113, 113, 1, 1, 1, 97, 97, 97, 73, 73, 73, 73, 73, 73, 97]

cp's OEIS Frontend

A060362 a(n) = Min { { smallest prime > k } - k, k - { largest prime < k } }, where k = lcm(1..n) = A003418(n).

Table of values

List of values

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	13
12	13
13	23
14	23
15	23
16	17
17	19
18	19
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	31
28	31
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	43
38	43
39	43
40	43
41	47
42	47
43	59
44	59
45	59
46	59
47	1
48	1
49	59
50	59
51	59
52	59
53	61
54	61
55	61
56	61
57	61
58	61
59	113
60	113
61	1
62	1
63	1
64	97
65	97
66	97
67	73
68	73
69	73
70	73
71	73
72	73
73	97

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	13
12	13
13	23
14	23
15	23
16	17
17	19
18	19
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	31
28	31
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	43
38	43
39	43
40	43
41	47
42	47
43	59
44	59
45	59
46	59
47	1
48	1
49	59
50	59
51	59
52	59
53	61
54	61
55	61
56	61
57	61
58	61
59	113
60	113
61	1
62	1
63	1
64	97
65	97
66	97
67	73
68	73
69	73
70	73
71	73
72	73
73	97

n	a(n)
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	13
12	13
13	23
14	23
15	23
16	17
17	19
18	19
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	31
28	31
29	1
30	1
31	1
32	1
33	1
34	1
35	1
36	1
37	43
38	43
39	43
40	43
41	47
42	47
43	59
44	59
45	59
46	59
47	1
48	1
49	59
50	59
51	59
52	59
53	61
54	61
55	61
56	61
57	61
58	61
59	113
60	113
61	1
62	1
63	1
64	97
65	97
66	97
67	73
68	73
69	73
70	73
71	73
72	73
73	97