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.

A131549 Least exponent k such that 3^k has exactly n consecutive 4's in its decimal representation.

Table of values

n a(n)
1 5
2 12
3 55
4 308
5 510
6 2340
7 7286
8 9670
9 125406
10 222961
11 847169
12 639226
13 6250771
14 14929721

List of values

[5, 12, 55, 308, 510, 2340, 7286, 9670, 125406, 222961, 847169, 639226, 6250771, 14929721]