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.

A078266 Integer part of the arithmetic mean of all the distinct numbers formed by permuting the digits of concatenation of numbers from 1 to n.

Table of values

n a(n)
1 1
2 16
3 222
4 2777
5 33333
6 388888
7 4444444
8 49999999
9 555555555
10 46464646464
11 4102564102563
12 377777777777777
13 35947712418300653
14 3508771929824561403
15 349206349206349206348
16 35265700483091787439613
17 3599999999999999999999999

List of values

[1, 16, 222, 2777, 33333, 388888, 4444444, 49999999, 555555555, 46464646464, 4102564102563, 377777777777777, 35947712418300653, 3508771929824561403, 349206349206349206348, 35265700483091787439613, 3599999999999999999999999]

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

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