A239723 - cp's OEIS frontend

A239723 Least number k such that n^k + (n+1)^k + ... + (n+k-1)^k is prime or 0 if no such number exists.

n	a(n)
1	2
2	1
3	1
4	2
5	1
6	0
7	1
8	0
9	2
10	0
11	1
12	2
13	1
14	2
15	0
16	6
17	1
18	0
19	1
20	0
21	6
22	2
23	1
24	2
25	2
26	0
27	0
28	0
29	1
30	2
31	1
32	2
33	0
34	2
35	2
36	0
37	1
38	0
39	2
40	0
41	1
42	2
43	1
44	0
45	0
46	0
47	1
48	6
49	0
50	2
51	0
52	0
53	1
54	0
55	0
56	0
57	0
58	6
59	1
60	2
61	1
62	0
63	0
64	0
65	2
66	0
67	1
68	0
69	2
70	2
71	1
72	2
73	1
74	0
75	0
76	6
77	0
78	0
79	1
80	0
81	0
82	2
83	1
84	2
85	2
86	0
87	2
88	0
89	1
90	2
91	6

[2, 1, 1, 2, 1, 0, 1, 0, 2, 0, 1, 2, 1, 2, 0, 6, 1, 0, 1, 0, 6, 2, 1, 2, 2, 0, 0, 0, 1, 2, 1, 2, 0, 2, 2, 0, 1, 0, 2, 0, 1, 2, 1, 0, 0, 0, 1, 6, 0, 2, 0, 0, 1, 0, 0, 0, 0, 6, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 2, 2, 1, 2, 1, 0, 0, 6, 0, 0, 1, 0, 0, 2, 1, 2, 2, 0, 2, 0, 1, 2, 6]

cp's OEIS Frontend

A239723 Least number k such that n^k + (n+1)^k + ... + (n+k-1)^k is prime or 0 if no such number exists.

Table of values

List of values

n	a(n)
1	2
2	1
3	1
4	2
5	1
6	0
7	1
8	0
9	2
10	0
11	1
12	2
13	1
14	2
15	0
16	6
17	1
18	0
19	1
20	0
21	6
22	2
23	1
24	2
25	2
26	0
27	0
28	0
29	1
30	2
31	1
32	2
33	0
34	2
35	2
36	0
37	1
38	0
39	2
40	0
41	1
42	2
43	1
44	0
45	0
46	0
47	1
48	6
49	0
50	2
51	0
52	0
53	1
54	0
55	0
56	0
57	0
58	6
59	1
60	2
61	1
62	0
63	0
64	0
65	2
66	0
67	1
68	0
69	2
70	2
71	1
72	2
73	1
74	0
75	0
76	6
77	0
78	0
79	1
80	0
81	0
82	2
83	1
84	2
85	2
86	0
87	2
88	0
89	1
90	2
91	6

n	a(n)
1	2
2	1
3	1
4	2
5	1
6	0
7	1
8	0
9	2
10	0
11	1
12	2
13	1
14	2
15	0
16	6
17	1
18	0
19	1
20	0
21	6
22	2
23	1
24	2
25	2
26	0
27	0
28	0
29	1
30	2
31	1
32	2
33	0
34	2
35	2
36	0
37	1
38	0
39	2
40	0
41	1
42	2
43	1
44	0
45	0
46	0
47	1
48	6
49	0
50	2
51	0
52	0
53	1
54	0
55	0
56	0
57	0
58	6
59	1
60	2
61	1
62	0
63	0
64	0
65	2
66	0
67	1
68	0
69	2
70	2
71	1
72	2
73	1
74	0
75	0
76	6
77	0
78	0
79	1
80	0
81	0
82	2
83	1
84	2
85	2
86	0
87	2
88	0
89	1
90	2
91	6

n	a(n)
1	2
2	1
3	1
4	2
5	1
6	0
7	1
8	0
9	2
10	0
11	1
12	2
13	1
14	2
15	0
16	6
17	1
18	0
19	1
20	0
21	6
22	2
23	1
24	2
25	2
26	0
27	0
28	0
29	1
30	2
31	1
32	2
33	0
34	2
35	2
36	0
37	1
38	0
39	2
40	0
41	1
42	2
43	1
44	0
45	0
46	0
47	1
48	6
49	0
50	2
51	0
52	0
53	1
54	0
55	0
56	0
57	0
58	6
59	1
60	2
61	1
62	0
63	0
64	0
65	2
66	0
67	1
68	0
69	2
70	2
71	1
72	2
73	1
74	0
75	0
76	6
77	0
78	0
79	1
80	0
81	0
82	2
83	1
84	2
85	2
86	0
87	2
88	0
89	1
90	2
91	6