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.

A161551 The smallest composite number larger than the n-th composite number, which has a sum of digits equal to the n-th composite number.

Table of values

n a(n)
1 22
2 15
3 26
4 18
5 28
6 39
7 68
8 69
9 88
10 99
11 299
12 399
13 589
14 699
15 799
16 899
17 999
18 2899
19 3999
20 5999
21 6999
22 7999
23 9899
24 9999
25 29999
26 39999
27 58999
28 69999
29 89999
30 99999
31 299899
32 399999
33 499999
34 689999
35 699999
36 889999
37 999999
38 1999999
39 3899999
40 3999999

List of values

[22, 15, 26, 18, 28, 39, 68, 69, 88, 99, 299, 399, 589, 699, 799, 899, 999, 2899, 3999, 5999, 6999, 7999, 9899, 9999, 29999, 39999, 58999, 69999, 89999, 99999, 299899, 399999, 499999, 689999, 699999, 889999, 999999, 1999999, 3899999, 3999999]

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

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