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.

A069790 Triangular numbers with arithmetic mean of digits = 1 (sum of digits = number of digits).

Table of values

n a(n)
1 1
2 120
3 210
4 300
5 112101
6 100600020
7 101111310
8 110120220
9 200130021
10 200310120
11 1000051003
12 1010004040
13 1130002030
14 1411000003
15 2002021003
16 3200200003
17 5000050000
18 100110002070
19 111111101310
20 111202101003
21 180000300000
22 211104100200
23 231201020001
24 500001500001
25 501001000500
26 100021000424010

List of values

[1, 120, 210, 300, 112101, 100600020, 101111310, 110120220, 200130021, 200310120, 1000051003, 1010004040, 1130002030, 1411000003, 2002021003, 3200200003, 5000050000, 100110002070, 111111101310, 111202101003, 180000300000, 211104100200, 231201020001, 500001500001, 501001000500, 100021000424010]

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

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