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.

A173768 a(n) = (4*10^n - 31)/9.

Table of values

n a(n)
1 1
2 41
3 441
4 4441
5 44441
6 444441
7 4444441
8 44444441
9 444444441
10 4444444441
11 44444444441
12 444444444441
13 4444444444441
14 44444444444441
15 444444444444441
16 4444444444444441
17 44444444444444441
18 444444444444444441
19 4444444444444444441
20 44444444444444444441
21 444444444444444444441

List of values

[1, 41, 441, 4441, 44441, 444441, 4444441, 44444441, 444444441, 4444444441, 44444444441, 444444444441, 4444444444441, 44444444444441, 444444444444441, 4444444444444441, 44444444444444441, 444444444444444441, 4444444444444444441, 44444444444444444441, 444444444444444444441]

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

Content is available under The OEIS End-User License Agreement.