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.

A053899 Squares composed of digits {1,4,7}.

Table of values

n a(n)
1 1
2 4
3 144
4 441
5 1444
6 7744
7 7447441
8 4147177477444
9 7174474747441
10 1447471174444717444
11 117747174771111771147177144441
12 7174471471414771441747147717441
13 1147111747441771474111741117114417444
14 4741471777144414774147714111744447747417744

List of values

[1, 4, 144, 441, 1444, 7744, 7447441, 4147177477444, 7174474747441, 1447471174444717444, 117747174771111771147177144441, 7174471471414771441747147717441, 1147111747441771474111741117114417444, 4741471777144414774147714111744447747417744]

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

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