A381054 - cp's OEIS frontend

A381054 a(n) is the least k such that floor(sqrt(nk/d(nk))) - floor(sqrt(d(n*k))) = 1, where d(k) is the largest divisor of k which is <= sqrt(k).

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

[5, 4, 4, 2, 1, 2, 1, 1, 2, 1, 4, 1, 4, 1, 1, 5, 9, 1, 9, 3, 1, 2, 9, 3, 2, 2, 2, 3, 16, 2, 16, 3, 2, 5, 2, 2, 25, 5, 2, 2, 25, 2, 25, 1, 1, 5, 25, 2, 2, 1, 3, 1, 36, 1, 1, 2, 3, 8, 36, 1, 36, 8, 1, 3, 1, 1, 49, 3, 3, 1, 49, 1, 49, 13, 1, 3, 1, 1, 49, 1]

cp's OEIS Frontend

A381054 a(n) is the least k such that floor(sqrt(nk/d(nk))) - floor(sqrt(d(n*k))) = 1, where d(k) is the largest divisor of k which is <= sqrt(k).

Table of values

List of values

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

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

cp's OEIS Frontend

A381054 a(n) is the least k such that floor(sqrt(n*k/d(n*k))) - floor(sqrt(d(n*k))) = 1, where d(k) is the largest divisor of k which is <= sqrt(k).

Table of values

List of values

A381054 a(n) is the least k such that floor(sqrt(nk/d(nk))) - floor(sqrt(d(n*k))) = 1, where d(k) is the largest divisor of k which is <= sqrt(k).

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