A172216 - cp's OEIS frontend

A172216 Smallest k such that sum of digits of prime(n)^k is prime.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	3
7	2
8	5
9	1
10	1
11	7
12	2
13	1
14	1
15	1
16	2
17	5
18	1
19	1
20	6
21	2
22	2
23	1
24	1
25	4
26	1
27	4
28	2
29	2
30	1
31	2
32	1
33	1
34	1
35	2
36	1
37	1
38	4
39	6
40	1
41	1
42	2
43	1
44	1
45	1
46	1
47	3
48	1
49	1
50	1
51	5
52	6
53	1
54	4
55	4
56	1
57	1
58	2
59	2
60	1
61	1
62	4
63	3
64	1
65	1
66	1
67	1
68	1
69	8
70	2
71	1
72	1
73	2
74	1
75	1
76	5
77	2
78	1
79	1
80	1
81	8
82	1
83	4
84	2
85	3
86	1
87	1
88	2
89	1
90	1
91	1
92	4
93	1
94	8
95	3
96	2
97	6
98	2
99	3
100	6
101	2
102	1
103	10
104	8
105	1

[1, 1, 1, 1, 1, 3, 2, 5, 1, 1, 7, 2, 1, 1, 1, 2, 5, 1, 1, 6, 2, 2, 1, 1, 4, 1, 4, 2, 2, 1, 2, 1, 1, 1, 2, 1, 1, 4, 6, 1, 1, 2, 1, 1, 1, 1, 3, 1, 1, 1, 5, 6, 1, 4, 4, 1, 1, 2, 2, 1, 1, 4, 3, 1, 1, 1, 1, 1, 8, 2, 1, 1, 2, 1, 1, 5, 2, 1, 1, 1, 8, 1, 4, 2, 3, 1, 1, 2, 1, 1, 1, 4, 1, 8, 3, 2, 6, 2, 3, 6, 2, 1, 10, 8, 1]

cp's OEIS Frontend

A172216 Smallest k such that sum of digits of prime(n)^k is prime.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	3
7	2
8	5
9	1
10	1
11	7
12	2
13	1
14	1
15	1
16	2
17	5
18	1
19	1
20	6
21	2
22	2
23	1
24	1
25	4
26	1
27	4
28	2
29	2
30	1
31	2
32	1
33	1
34	1
35	2
36	1
37	1
38	4
39	6
40	1
41	1
42	2
43	1
44	1
45	1
46	1
47	3
48	1
49	1
50	1
51	5
52	6
53	1
54	4
55	4
56	1
57	1
58	2
59	2
60	1
61	1
62	4
63	3
64	1
65	1
66	1
67	1
68	1
69	8
70	2
71	1
72	1
73	2
74	1
75	1
76	5
77	2
78	1
79	1
80	1
81	8
82	1
83	4
84	2
85	3
86	1
87	1
88	2
89	1
90	1
91	1
92	4
93	1
94	8
95	3
96	2
97	6
98	2
99	3
100	6
101	2
102	1
103	10
104	8
105	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	3
7	2
8	5
9	1
10	1
11	7
12	2
13	1
14	1
15	1
16	2
17	5
18	1
19	1
20	6
21	2
22	2
23	1
24	1
25	4
26	1
27	4
28	2
29	2
30	1
31	2
32	1
33	1
34	1
35	2
36	1
37	1
38	4
39	6
40	1
41	1
42	2
43	1
44	1
45	1
46	1
47	3
48	1
49	1
50	1
51	5
52	6
53	1
54	4
55	4
56	1
57	1
58	2
59	2
60	1
61	1
62	4
63	3
64	1
65	1
66	1
67	1
68	1
69	8
70	2
71	1
72	1
73	2
74	1
75	1
76	5
77	2
78	1
79	1
80	1
81	8
82	1
83	4
84	2
85	3
86	1
87	1
88	2
89	1
90	1
91	1
92	4
93	1
94	8
95	3
96	2
97	6
98	2
99	3
100	6
101	2
102	1
103	10
104	8
105	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	3
7	2
8	5
9	1
10	1
11	7
12	2
13	1
14	1
15	1
16	2
17	5
18	1
19	1
20	6
21	2
22	2
23	1
24	1
25	4
26	1
27	4
28	2
29	2
30	1
31	2
32	1
33	1
34	1
35	2
36	1
37	1
38	4
39	6
40	1
41	1
42	2
43	1
44	1
45	1
46	1
47	3
48	1
49	1
50	1
51	5
52	6
53	1
54	4
55	4
56	1
57	1
58	2
59	2
60	1
61	1
62	4
63	3
64	1
65	1
66	1
67	1
68	1
69	8
70	2
71	1
72	1
73	2
74	1
75	1
76	5
77	2
78	1
79	1
80	1
81	8
82	1
83	4
84	2
85	3
86	1
87	1
88	2
89	1
90	1
91	1
92	4
93	1
94	8
95	3
96	2
97	6
98	2
99	3
100	6
101	2
102	1
103	10
104	8
105	1