A064891 - cp's OEIS frontend

A064891 "Binary potency" of n: length of shortest blocks of 0's inserted between the bits of n required to "dilute" it into a nonprime.

n	a(n)
1	0
2	1
3	2
4	0
5	2
6	0
7	1
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	2
18	0
19	1
20	0
21	0
22	0
23	2
24	0
25	0
26	0
27	0
28	0
29	3
30	0
31	1
32	0
33	0
34	0
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	0
43	3
44	0
45	0
46	0
47	3
48	0
49	0
50	0
51	0
52	0
53	3
54	0
55	0
56	0
57	0
58	0
59	1
60	0
61	3
62	0
63	0
64	0
65	0
66	0
67	1
68	0
69	0
70	0
71	1
72	0
73	1
74	0
75	0
76	0
77	0
78	0
79	1
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	0
88	0
89	1
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	1
98	0
99	0
100	0
101	1
102	0
103	1
104	0
105	0

[0, 1, 2, 0, 2, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 3, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 3, 0, 0, 0, 3, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 1, 0, 3, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0]

cp's OEIS Frontend

A064891 "Binary potency" of n: length of shortest blocks of 0's inserted between the bits of n required to "dilute" it into a nonprime.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	0
5	2
6	0
7	1
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	2
18	0
19	1
20	0
21	0
22	0
23	2
24	0
25	0
26	0
27	0
28	0
29	3
30	0
31	1
32	0
33	0
34	0
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	0
43	3
44	0
45	0
46	0
47	3
48	0
49	0
50	0
51	0
52	0
53	3
54	0
55	0
56	0
57	0
58	0
59	1
60	0
61	3
62	0
63	0
64	0
65	0
66	0
67	1
68	0
69	0
70	0
71	1
72	0
73	1
74	0
75	0
76	0
77	0
78	0
79	1
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	0
88	0
89	1
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	1
98	0
99	0
100	0
101	1
102	0
103	1
104	0
105	0

n	a(n)
1	0
2	1
3	2
4	0
5	2
6	0
7	1
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	2
18	0
19	1
20	0
21	0
22	0
23	2
24	0
25	0
26	0
27	0
28	0
29	3
30	0
31	1
32	0
33	0
34	0
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	0
43	3
44	0
45	0
46	0
47	3
48	0
49	0
50	0
51	0
52	0
53	3
54	0
55	0
56	0
57	0
58	0
59	1
60	0
61	3
62	0
63	0
64	0
65	0
66	0
67	1
68	0
69	0
70	0
71	1
72	0
73	1
74	0
75	0
76	0
77	0
78	0
79	1
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	0
88	0
89	1
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	1
98	0
99	0
100	0
101	1
102	0
103	1
104	0
105	0

n	a(n)
1	0
2	1
3	2
4	0
5	2
6	0
7	1
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	2
18	0
19	1
20	0
21	0
22	0
23	2
24	0
25	0
26	0
27	0
28	0
29	3
30	0
31	1
32	0
33	0
34	0
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	0
43	3
44	0
45	0
46	0
47	3
48	0
49	0
50	0
51	0
52	0
53	3
54	0
55	0
56	0
57	0
58	0
59	1
60	0
61	3
62	0
63	0
64	0
65	0
66	0
67	1
68	0
69	0
70	0
71	1
72	0
73	1
74	0
75	0
76	0
77	0
78	0
79	1
80	0
81	0
82	0
83	2
84	0
85	0
86	0
87	0
88	0
89	1
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	1
98	0
99	0
100	0
101	1
102	0
103	1
104	0
105	0