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.

A053957 Squares composed of digits {4,6,7}.

Original entry on oeis.org

4, 64, 676, 7744, 4444667464644, 66667767777644764644, 767646664777467676766464, 6446477674444767467664676, 7446477664767776477464446664464, 64446474444746646444646744666444644, 664676644466466777446466766667744446667647467664
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Crossrefs

Cf. A053956.

Formula

a(n) = A053956(n)^2. - Elmo R. Oliveira, Jul 17 2025

Extensions

a(6)-a(7) from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
a(8) from Jon E. Schoenfield, Sep 04 2006
a(9)-a(10) from Mishima's website added by Max Alekseyev, May 07 2009
a(11) from Mishima's website added by Elmo R. Oliveira, Jul 17 2025