A358667 - cp's OEIS frontend

A358667 T(n,k) is the k-th integer j > 1 such that the sum of digits of n^j is a power of n (or -1 if no such k-th integer exists); table read by downward antidiagonals.

n	a(n)
1	2
2	3
3	2
4	4
5	3
6	2
7	5
8	9
9	3
10	18
11	6
12	36
13	4
14	88
15	8
16	7
17	85
18	5
19	97
20	208
21	7
22	8
23	176
24	9
25	100
26	977
27	8
28	4
29	9
30	194
31	10
32	1521
33	1007
34	9
35	11
36	3
37	10
38	200
39	11
40	6034
41	4938
42	10
43	4433
44	12
45	2
46	11
47	375
48	13
49	6052
50	24709
51	13
52	30810
53	125
54	18
55	2
56	12
57	1517
58	16
59	96867
60	24733
61	51
62	216613
63	1014
64	1503
65	3

[2, 3, 2, 4, 3, 2, 5, 9, 3, 18, 6, 36, 4, 88, 8, 7, 85, 5, 97, 208, 7, 8, 176, 9, 100, 977, 8, 4, 9, 194, 10, 1521, 1007, 9, 11, 3, 10, 200, 11, 6034, 4938, 10, 4433, 12, 2, 11, 375, 13, 6052, 24709, 13, 30810, 125, 18, 2, 12, 1517, 16, 96867, 24733, 51, 216613, 1014, 1503, 3]

cp's OEIS Frontend

A358667 T(n,k) is the k-th integer j > 1 such that the sum of digits of n^j is a power of n (or -1 if no such k-th integer exists); table read by downward antidiagonals.

Table of values

List of values