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.

A136840 Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 8.

Table of values

n a(n)
1 0
2 1
3 10
4 38
5 100
6 380
7 1000
8 1141
9 1188
10 3441
11 3800
12 10000
13 10401
14 11410
15 11880
16 18188
17 33188
18 33441
19 34410
20 38000
21 100000
22 104010
23 114100
24 118800
25 181880
26 331880
27 334410
28 344100
29 380000
30 1000000
31 1004001
32 1040100
33 1141000
34 1188000
35 1818800
36 3318800
37 3344100
38 3344848
39 3441000
40 3441048
41 3800000
42 10000000
43 10040010
44 10188441
45 10401000

List of values

[0, 1, 10, 38, 100, 380, 1000, 1141, 1188, 3441, 3800, 10000, 10401, 11410, 11880, 18188, 33188, 33441, 34410, 38000, 100000, 104010, 114100, 118800, 181880, 331880, 334410, 344100, 380000, 1000000, 1004001, 1040100, 1141000, 1188000, 1818800, 3318800, 3344100, 3344848, 3441000, 3441048, 3800000, 10000000, 10040010, 10188441, 10401000]

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

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