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.

A053905 Squares composed of digits {1,5,8}.

Original entry on oeis.org

1, 81, 11881, 88118818815155881, 18851515118581858155155881, 11555185818155188818511188881585888881, 5818888111118115811551585855811558551185881
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Crossrefs

Cf. A053904.

Formula

a(n) = A053904(n)^2. - Elmo R. Oliveira, Jul 18 2025

Extensions

a(5) from Jon E. Schoenfield, Sep 03 2006
a(6)-a(7) from Mishima's webpage added by Max Alekseyev, May 21 2009