A058472 Squares composed of digits {7,8,9}.

9, 98989978877879888789778997998889

Offset: 1

Author

Patrick De Geest, Nov 15 2000

Keywords

• nonn
• base
• hard
• more
• bref

Links

• Patrick De Geest, Index to related sequences
• Shyam Sunder Gupta, Elegance of Squares, Cubes, and Higher Powers, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 2, 29-81.
• Hisanori Mishima, Sporadic tridigital solutions

Crossrefs

Cf. A058471.

Formula

a(n) = A058471(n)^2.