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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A217051 Smallest k such that the number k^n in its decimal representation has a prime number of copies of the digit d for each d from 0 through 9.

Table of values

n a(n)
2 3164252736
3 258479
4 69636
5 15165
6 3123
7 1019
8 1315
9 815
10 307
11 205
12 475
13 347
14 143
15 151
16 272
17 1388
18 618
19 245
20 12080
21 48
22 8635
23 23
24 287467
25 17
26 23118
27 8440
28 48387
29 127009
30 65457
31 70662
32 13181
33 42911
34 4965
35 162192
36 14460
37 226994
38 12
39 55853
40 4104749
41 2674855

List of values

[3164252736, 258479, 69636, 15165, 3123, 1019, 1315, 815, 307, 205, 475, 347, 143, 151, 272, 1388, 618, 245, 12080, 48, 8635, 23, 287467, 17, 23118, 8440, 48387, 127009, 65457, 70662, 13181, 42911, 4965, 162192, 14460, 226994, 12, 55853, 4104749, 2674855]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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