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.

A053911 Squares composed of digits {1,6,9}.

Original entry on oeis.org

1, 9, 16, 169, 196, 961, 69169, 69696, 9696996, 16966161, 611919169, 6661661161, 696199996996, 1911961611169, 99191919116196, 116116119966961, 116696699999166169, 699666116199699961, 996111661161199969, 611961619961911196961, 1616161166196691196196, 9919969966699691196169
Offset: 1

Views

Author

Patrick De Geest, Mar 15 2000

Keywords

Crossrefs

Cf. A053910.

Formula

a(n) = A053910(n)^2. - Elmo R. Oliveira, Jul 16 2025