A210615 - cp's OEIS frontend

A210615 Least semiprime dividing n, or 0 if no semiprime divides n.

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

[0, 0, 0, 4, 0, 6, 0, 4, 9, 10, 0, 4, 0, 14, 15, 4, 0, 6, 0, 4, 21, 22, 0, 4, 25, 26, 9, 4, 0, 6, 0, 4, 33, 34, 35, 4, 0, 38, 39, 4, 0, 6, 0, 4, 9, 46, 0, 4, 49, 10, 51, 4, 0, 6, 55, 4, 57, 58, 0, 4, 0, 62, 9, 4, 65, 6, 0, 4, 69, 10, 0, 4, 0, 74, 15, 4, 77, 6]

cp's OEIS Frontend

A210615 Least semiprime dividing n, or 0 if no semiprime divides n.

Table of values

List of values

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

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

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