A166597 - cp's OEIS frontend

A166597 Let p = largest prime <= n, with p(0)=p(1)=0, and let q = smallest prime > n; then a(n) = q-p.

n	a(n)
0	2
1	2
2	1
3	2
4	2
5	2
6	2
7	4
8	4
9	4
10	4
11	2
12	2
13	4
14	4
15	4
16	4
17	2
18	2
19	4
20	4
21	4
22	4
23	6
24	6
25	6
26	6
27	6
28	6
29	2
30	2
31	6
32	6
33	6
34	6
35	6
36	6
37	4
38	4
39	4
40	4
41	2
42	2
43	4
44	4
45	4
46	4
47	6
48	6
49	6
50	6
51	6
52	6
53	6
54	6
55	6
56	6
57	6
58	6
59	2
60	2
61	6
62	6
63	6
64	6
65	6
66	6
67	4
68	4
69	4
70	4
71	2
72	2
73	6
74	6
75	6
76	6
77	6
78	6
79	4
80	4
81	4
82	4
83	6
84	6
85	6
86	6
87	6
88	6
89	8
90	8
91	8
92	8
93	8
94	8
95	8
96	8
97	4
98	4
99	4
100	4
101	2
102	2
103	4
104	4

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

cp's OEIS Frontend

A166597 Let p = largest prime <= n, with p(0)=p(1)=0, and let q = smallest prime > n; then a(n) = q-p.

Table of values

List of values

n	a(n)
0	2
1	2
2	1
3	2
4	2
5	2
6	2
7	4
8	4
9	4
10	4
11	2
12	2
13	4
14	4
15	4
16	4
17	2
18	2
19	4
20	4
21	4
22	4
23	6
24	6
25	6
26	6
27	6
28	6
29	2
30	2
31	6
32	6
33	6
34	6
35	6
36	6
37	4
38	4
39	4
40	4
41	2
42	2
43	4
44	4
45	4
46	4
47	6
48	6
49	6
50	6
51	6
52	6
53	6
54	6
55	6
56	6
57	6
58	6
59	2
60	2
61	6
62	6
63	6
64	6
65	6
66	6
67	4
68	4
69	4
70	4
71	2
72	2
73	6
74	6
75	6
76	6
77	6
78	6
79	4
80	4
81	4
82	4
83	6
84	6
85	6
86	6
87	6
88	6
89	8
90	8
91	8
92	8
93	8
94	8
95	8
96	8
97	4
98	4
99	4
100	4
101	2
102	2
103	4
104	4

n	a(n)
0	2
1	2
2	1
3	2
4	2
5	2
6	2
7	4
8	4
9	4
10	4
11	2
12	2
13	4
14	4
15	4
16	4
17	2
18	2
19	4
20	4
21	4
22	4
23	6
24	6
25	6
26	6
27	6
28	6
29	2
30	2
31	6
32	6
33	6
34	6
35	6
36	6
37	4
38	4
39	4
40	4
41	2
42	2
43	4
44	4
45	4
46	4
47	6
48	6
49	6
50	6
51	6
52	6
53	6
54	6
55	6
56	6
57	6
58	6
59	2
60	2
61	6
62	6
63	6
64	6
65	6
66	6
67	4
68	4
69	4
70	4
71	2
72	2
73	6
74	6
75	6
76	6
77	6
78	6
79	4
80	4
81	4
82	4
83	6
84	6
85	6
86	6
87	6
88	6
89	8
90	8
91	8
92	8
93	8
94	8
95	8
96	8
97	4
98	4
99	4
100	4
101	2
102	2
103	4
104	4

n	a(n)
0	2
1	2
2	1
3	2
4	2
5	2
6	2
7	4
8	4
9	4
10	4
11	2
12	2
13	4
14	4
15	4
16	4
17	2
18	2
19	4
20	4
21	4
22	4
23	6
24	6
25	6
26	6
27	6
28	6
29	2
30	2
31	6
32	6
33	6
34	6
35	6
36	6
37	4
38	4
39	4
40	4
41	2
42	2
43	4
44	4
45	4
46	4
47	6
48	6
49	6
50	6
51	6
52	6
53	6
54	6
55	6
56	6
57	6
58	6
59	2
60	2
61	6
62	6
63	6
64	6
65	6
66	6
67	4
68	4
69	4
70	4
71	2
72	2
73	6
74	6
75	6
76	6
77	6
78	6
79	4
80	4
81	4
82	4
83	6
84	6
85	6
86	6
87	6
88	6
89	8
90	8
91	8
92	8
93	8
94	8
95	8
96	8
97	4
98	4
99	4
100	4
101	2
102	2
103	4
104	4