A080368 - cp's OEIS frontend

A080368 a(n) is the least unitary prime divisor of n, or 0 if no such prime divisor exists.

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

[0, 2, 3, 0, 5, 2, 7, 0, 0, 2, 11, 3, 13, 2, 3, 0, 17, 2, 19, 5, 3, 2, 23, 3, 0, 2, 0, 7, 29, 2, 31, 0, 3, 2, 5, 0, 37, 2, 3, 5, 41, 2, 43, 11, 5, 2, 47, 3, 0, 2, 3, 13, 53, 2, 5, 7, 3, 2, 59, 3, 61, 2, 7, 0, 5, 2, 67, 17, 3, 2, 71, 0, 73, 2, 3, 19, 7, 2, 79, 5, 0, 2, 83, 3, 5, 2, 3, 11, 89, 2, 7, 23, 3, 2]

cp's OEIS Frontend

A080368 a(n) is the least unitary prime divisor of n, or 0 if no such prime divisor exists.

Table of values

List of values

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

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

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