A259111 - cp's OEIS frontend

A259111 a(n) = least number k > 1 such that 1^k + 2^k + ... + k^k == n (mod k).

n	a(n)
1	2
2	4
3	2
4	8
5	2
6	3
7	2
8	16
9	2
10	4
11	2
12	3
13	2
14	4
15	2
16	32
17	2
18	3
19	2
20	5
21	2
22	4
23	2
24	3
25	2
26	4
27	2
28	7
29	2
30	3
31	2
32	64
33	2
34	4
35	2
36	3
37	2
38	4
39	2
40	5
41	2
42	3
43	2
44	8
45	2
46	4
47	2
48	3
49	2
50	4
51	2
52	8
53	2
54	3
55	2
56	7
57	2
58	4
59	2
60	3
61	2
62	4
63	2
64	128
65	2
66	3
67	2
68	8
69	2
70	4
71	2
72	3
73	2
74	4
75	2
76	8
77	2
78	3
79	2
80	5
81	2
82	4
83	2
84	3
85	2
86	4
87	2
88	11
89	2
90	3
91	2
92	8
93	2
94	4
95	2
96	3
97	2
98	4
99	2
100	5

[2, 4, 2, 8, 2, 3, 2, 16, 2, 4, 2, 3, 2, 4, 2, 32, 2, 3, 2, 5, 2, 4, 2, 3, 2, 4, 2, 7, 2, 3, 2, 64, 2, 4, 2, 3, 2, 4, 2, 5, 2, 3, 2, 8, 2, 4, 2, 3, 2, 4, 2, 8, 2, 3, 2, 7, 2, 4, 2, 3, 2, 4, 2, 128, 2, 3, 2, 8, 2, 4, 2, 3, 2, 4, 2, 8, 2, 3, 2, 5, 2, 4, 2, 3, 2, 4, 2, 11, 2, 3, 2, 8, 2, 4, 2, 3, 2, 4, 2, 5]

cp's OEIS Frontend

A259111 a(n) = least number k > 1 such that 1^k + 2^k + ... + k^k == n (mod k).

Table of values

List of values

n	a(n)
1	2
2	4
3	2
4	8
5	2
6	3
7	2
8	16
9	2
10	4
11	2
12	3
13	2
14	4
15	2
16	32
17	2
18	3
19	2
20	5
21	2
22	4
23	2
24	3
25	2
26	4
27	2
28	7
29	2
30	3
31	2
32	64
33	2
34	4
35	2
36	3
37	2
38	4
39	2
40	5
41	2
42	3
43	2
44	8
45	2
46	4
47	2
48	3
49	2
50	4
51	2
52	8
53	2
54	3
55	2
56	7
57	2
58	4
59	2
60	3
61	2
62	4
63	2
64	128
65	2
66	3
67	2
68	8
69	2
70	4
71	2
72	3
73	2
74	4
75	2
76	8
77	2
78	3
79	2
80	5
81	2
82	4
83	2
84	3
85	2
86	4
87	2
88	11
89	2
90	3
91	2
92	8
93	2
94	4
95	2
96	3
97	2
98	4
99	2
100	5

n	a(n)
1	2
2	4
3	2
4	8
5	2
6	3
7	2
8	16
9	2
10	4
11	2
12	3
13	2
14	4
15	2
16	32
17	2
18	3
19	2
20	5
21	2
22	4
23	2
24	3
25	2
26	4
27	2
28	7
29	2
30	3
31	2
32	64
33	2
34	4
35	2
36	3
37	2
38	4
39	2
40	5
41	2
42	3
43	2
44	8
45	2
46	4
47	2
48	3
49	2
50	4
51	2
52	8
53	2
54	3
55	2
56	7
57	2
58	4
59	2
60	3
61	2
62	4
63	2
64	128
65	2
66	3
67	2
68	8
69	2
70	4
71	2
72	3
73	2
74	4
75	2
76	8
77	2
78	3
79	2
80	5
81	2
82	4
83	2
84	3
85	2
86	4
87	2
88	11
89	2
90	3
91	2
92	8
93	2
94	4
95	2
96	3
97	2
98	4
99	2
100	5

n	a(n)
1	2
2	4
3	2
4	8
5	2
6	3
7	2
8	16
9	2
10	4
11	2
12	3
13	2
14	4
15	2
16	32
17	2
18	3
19	2
20	5
21	2
22	4
23	2
24	3
25	2
26	4
27	2
28	7
29	2
30	3
31	2
32	64
33	2
34	4
35	2
36	3
37	2
38	4
39	2
40	5
41	2
42	3
43	2
44	8
45	2
46	4
47	2
48	3
49	2
50	4
51	2
52	8
53	2
54	3
55	2
56	7
57	2
58	4
59	2
60	3
61	2
62	4
63	2
64	128
65	2
66	3
67	2
68	8
69	2
70	4
71	2
72	3
73	2
74	4
75	2
76	8
77	2
78	3
79	2
80	5
81	2
82	4
83	2
84	3
85	2
86	4
87	2
88	11
89	2
90	3
91	2
92	8
93	2
94	4
95	2
96	3
97	2
98	4
99	2
100	5