A092487 - cp's OEIS frontend

A092487 a(n) = least k such that {n+1, n+2, n+3, ... n+k} has a subset the product of whose members with n is a square.

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

[0, 4, 5, 0, 5, 6, 7, 7, 0, 8, 11, 8, 13, 7, 9, 0, 17, 9, 19, 10, 7, 11, 23, 8, 0, 13, 8, 12, 29, 12, 31, 13, 11, 17, 13, 0, 37, 19, 13, 10, 41, 14, 43, 11, 15, 23, 47, 6, 0, 13, 17, 13, 53, 16, 11, 16, 19, 29, 59, 15, 61, 31, 14, 0, 13, 14, 67, 17]

cp's OEIS Frontend

A092487 a(n) = least k such that {n+1, n+2, n+3, ... n+k} has a subset the product of whose members with n is a square.

Table of values

List of values

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

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

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