A163925 - cp's OEIS frontend

A163925 Table, row n is nonprime numbers k such that the largest divisor of nk <= sqrt(nk) is n.

n	a(n)
1	1
2	4
3	4
4	6
5	9
6	4
7	6
8	8
9	6
10	8
11	9
12	10
13	15
14	25
15	6
16	8
17	9
18	10
19	8
20	9
21	10
22	12
23	14
24	15
25	21
26	25
27	35
28	49
29	8
30	9
31	10
32	12
33	14
34	16
35	9
36	10
37	12
38	14
39	15
40	18
41	21
42	27
43	10
44	12
45	14
46	15
47	16
48	20
49	25
50	12
51	14
52	15
53	16
54	18
55	20
56	21
57	22
58	25
59	27
60	33
61	35
62	49
63	55
64	77
65	121
66	12
67	14
68	15
69	16
70	18
71	22
72	14
73	15
74	16
75	18
76	20

[1, 4, 4, 6, 9, 4, 6, 8, 6, 8, 9, 10, 15, 25, 6, 8, 9, 10, 8, 9, 10, 12, 14, 15, 21, 25, 35, 49, 8, 9, 10, 12, 14, 16, 9, 10, 12, 14, 15, 18, 21, 27, 10, 12, 14, 15, 16, 20, 25, 12, 14, 15, 16, 18, 20, 21, 22, 25, 27, 33, 35, 49, 55, 77, 121, 12, 14, 15, 16, 18, 22, 14, 15, 16, 18, 20]

cp's OEIS Frontend

A163925 Table, row n is nonprime numbers k such that the largest divisor of nk <= sqrt(nk) is n.

Table of values

List of values

n	a(n)
1	1
2	4
3	4
4	6
5	9
6	4
7	6
8	8
9	6
10	8
11	9
12	10
13	15
14	25
15	6
16	8
17	9
18	10
19	8
20	9
21	10
22	12
23	14
24	15
25	21
26	25
27	35
28	49
29	8
30	9
31	10
32	12
33	14
34	16
35	9
36	10
37	12
38	14
39	15
40	18
41	21
42	27
43	10
44	12
45	14
46	15
47	16
48	20
49	25
50	12
51	14
52	15
53	16
54	18
55	20
56	21
57	22
58	25
59	27
60	33
61	35
62	49
63	55
64	77
65	121
66	12
67	14
68	15
69	16
70	18
71	22
72	14
73	15
74	16
75	18
76	20

n	a(n)
1	1
2	4
3	4
4	6
5	9
6	4
7	6
8	8
9	6
10	8
11	9
12	10
13	15
14	25
15	6
16	8
17	9
18	10
19	8
20	9
21	10
22	12
23	14
24	15
25	21
26	25
27	35
28	49
29	8
30	9
31	10
32	12
33	14
34	16
35	9
36	10
37	12
38	14
39	15
40	18
41	21
42	27
43	10
44	12
45	14
46	15
47	16
48	20
49	25
50	12
51	14
52	15
53	16
54	18
55	20
56	21
57	22
58	25
59	27
60	33
61	35
62	49
63	55
64	77
65	121
66	12
67	14
68	15
69	16
70	18
71	22
72	14
73	15
74	16
75	18
76	20

cp's OEIS Frontend

A163925 Table, row n is nonprime numbers k such that the largest divisor of n*k <= sqrt(n*k) is n.

Table of values

List of values

A163925 Table, row n is nonprime numbers k such that the largest divisor of nk <= sqrt(nk) is n.

n	a(n)
1	1
2	4
3	4
4	6
5	9
6	4
7	6
8	8
9	6
10	8
11	9
12	10
13	15
14	25
15	6
16	8
17	9
18	10
19	8
20	9
21	10
22	12
23	14
24	15
25	21
26	25
27	35
28	49
29	8
30	9
31	10
32	12
33	14
34	16
35	9
36	10
37	12
38	14
39	15
40	18
41	21
42	27
43	10
44	12
45	14
46	15
47	16
48	20
49	25
50	12
51	14
52	15
53	16
54	18
55	20
56	21
57	22
58	25
59	27
60	33
61	35
62	49
63	55
64	77
65	121
66	12
67	14
68	15
69	16
70	18
71	22
72	14
73	15
74	16
75	18
76	20