A289985 - cp's OEIS frontend

A289985 Smallest positive k such that (n+1)^k + (-n)^k is divisible by a square greater than 1.

n	a(n)
1	10
2	11
3	2
4	55
5	21
6	10
7	3
8	10
9	33
10	26
11	10
12	21
13	10
14	5
15	21
16	10
17	55
18	10
19	8
20	2
21	2
22	3
23	7
24	78
25	55
26	3
27	34
28	2
29	21
30	78
31	10
32	68
33	10
34	41
35	57
36	10
37	55
38	10
39	55
40	21
41	10

[10, 11, 2, 55, 21, 10, 3, 10, 33, 26, 10, 21, 10, 5, 21, 10, 55, 10, 8, 2, 2, 3, 7, 78, 55, 3, 34, 2, 21, 78, 10, 68, 10, 41, 57, 10, 55, 10, 55, 21, 10]

cp's OEIS Frontend

A289985 Smallest positive k such that (n+1)^k + (-n)^k is divisible by a square greater than 1.

Table of values

List of values

n	a(n)
1	10
2	11
3	2
4	55
5	21
6	10
7	3
8	10
9	33
10	26
11	10
12	21
13	10
14	5
15	21
16	10
17	55
18	10
19	8
20	2
21	2
22	3
23	7
24	78
25	55
26	3
27	34
28	2
29	21
30	78
31	10
32	68
33	10
34	41
35	57
36	10
37	55
38	10
39	55
40	21
41	10

n	a(n)
1	10
2	11
3	2
4	55
5	21
6	10
7	3
8	10
9	33
10	26
11	10
12	21
13	10
14	5
15	21
16	10
17	55
18	10
19	8
20	2
21	2
22	3
23	7
24	78
25	55
26	3
27	34
28	2
29	21
30	78
31	10
32	68
33	10
34	41
35	57
36	10
37	55
38	10
39	55
40	21
41	10

n	a(n)
1	10
2	11
3	2
4	55
5	21
6	10
7	3
8	10
9	33
10	26
11	10
12	21
13	10
14	5
15	21
16	10
17	55
18	10
19	8
20	2
21	2
22	3
23	7
24	78
25	55
26	3
27	34
28	2
29	21
30	78
31	10
32	68
33	10
34	41
35	57
36	10
37	55
38	10
39	55
40	21
41	10