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.

A039938 Smallest k for which k, 2k, ... nk all contain the digit 7.

Table of values

n a(n)
1 7
2 37
3 237
4 1789
5 4357
6 14379
7 19587
8 93957
9 189572
10 189572
11 189597
12 189597
13 189597
14 1234397
15 1839597
16 1958798
17 1983957
18 1983957
19 1983957
20 1983957
21 1983957
22 1983957
23 3978594
24 11983957
25 19596487
26 29195397
27 29195397
28 29195397

List of values

[7, 37, 237, 1789, 4357, 14379, 19587, 93957, 189572, 189572, 189597, 189597, 189597, 1234397, 1839597, 1958798, 1983957, 1983957, 1983957, 1983957, 1983957, 1983957, 3978594, 11983957, 19596487, 29195397, 29195397, 29195397]