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.

A285494 Numbers k such that digit sum of k = number of distinct prime factors of k.

Table of values

n a(n)
1 20
2 30
3 102
4 120
5 200
6 300
7 1002
8 1200
9 2000
10 2001
11 2002
12 3000
13 3010
14 10001
15 10002
16 10011
17 10030
18 10120
19 11001
20 11020
21 11110
22 12000
23 20000
24 20001
25 21010
26 30000
27 30030
28 30100
29 100001
30 100030
31 100101
32 100130
33 100210
34 100300
35 101001
36 101101
37 101200
38 102102
39 110001
40 110200

List of values

[20, 30, 102, 120, 200, 300, 1002, 1200, 2000, 2001, 2002, 3000, 3010, 10001, 10002, 10011, 10030, 10120, 11001, 11020, 11110, 12000, 20000, 20001, 21010, 30000, 30030, 30100, 100001, 100030, 100101, 100130, 100210, 100300, 101001, 101101, 101200, 102102, 110001, 110200]

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

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