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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.

A137051 Numbers k such that k and k^2 use only the digits 1, 4, 5, 8 and 9.

Table of values

n a(n)
1 1
2 9
3 141
4 441
5 941
6 1191
7 99559
8 118988
9 445488
10 999559
11 9958988
12 44544191
13 445919891
14 941195441
15 994458891
16 9195411891
17 9459859859
18 9994941191
19 11898949191
20 44551594191
21 44555449891
22 94858548141
23 99498181488
24 445145914891
25 445584958891
26 919184195441
27 945944814191
28 9189418814859
29 9195188958988
30 9444544454559

List of values

[1, 9, 141, 441, 941, 1191, 99559, 118988, 445488, 999559, 9958988, 44544191, 445919891, 941195441, 994458891, 9195411891, 9459859859, 9994941191, 11898949191, 44551594191, 44555449891, 94858548141, 99498181488, 445145914891, 445584958891, 919184195441, 945944814191, 9189418814859, 9195188958988, 9444544454559]

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

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