A179312 - cp's OEIS frontend

A179312 Largest 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	6
13	0
14	14
15	15
16	4
17	0
18	9
19	0
20	10
21	21
22	22
23	0
24	6
25	25
26	26
27	9
28	14
29	0
30	15
31	0
32	4
33	33
34	34
35	35
36	9
37	0
38	38
39	39
40	10
41	0
42	21
43	0
44	22
45	15
46	46
47	0
48	6
49	49
50	25
51	51
52	26
53	0
54	9
55	55
56	14
57	57
58	58
59	0
60	15
61	0
62	62
63	21
64	4
65	65
66	33
67	0
68	34
69	69
70	35
71	0
72	9
73	0
74	74

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

cp's OEIS Frontend

A179312 Largest 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	6
13	0
14	14
15	15
16	4
17	0
18	9
19	0
20	10
21	21
22	22
23	0
24	6
25	25
26	26
27	9
28	14
29	0
30	15
31	0
32	4
33	33
34	34
35	35
36	9
37	0
38	38
39	39
40	10
41	0
42	21
43	0
44	22
45	15
46	46
47	0
48	6
49	49
50	25
51	51
52	26
53	0
54	9
55	55
56	14
57	57
58	58
59	0
60	15
61	0
62	62
63	21
64	4
65	65
66	33
67	0
68	34
69	69
70	35
71	0
72	9
73	0
74	74

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

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