cp's OEIS Frontend

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.

A216139 a(n) = conjectured number of integers k such that n^k has no four consecutive identical digits.

Table of values

n a(n)
2 3674
3 2385
4 1836
5 1608
6 1438
7 1333
8 1239
9 1201
10 3
11 1040
12 1001
13 978
14 980
15 948
16 929
17 881
18 914
19 852
20 3
21 828
22 818
23 834
24 820
25 819
26 779
27 786
28 762
29 750
30 3
31 708
32 753
33 759
34 738
35 676
36 709
37 685
38 761
39 703
40 3
41 703
42 728
43 707
44 660
45 675
46 667
47 633
48 649
49 660
50 3

List of values

[3674, 2385, 1836, 1608, 1438, 1333, 1239, 1201, 3, 1040, 1001, 978, 980, 948, 929, 881, 914, 852, 3, 828, 818, 834, 820, 819, 779, 786, 762, 750, 3, 708, 753, 759, 738, 676, 709, 685, 761, 703, 3, 703, 728, 707, 660, 675, 667, 633, 649, 660, 3]