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

9, 98989978877879888789778997998889

Offset

1,1

Links

Table of n, a(n) for n=1..2.

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

Formula

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

Crossrefs

Cf. A058471.

Sequence in context: A067487 A058448 A058454 * A058474 A285476 A270035

Adjacent sequences: A058469 A058470 A058471 * A058473 A058474 A058475

Keyword

nonn,base,hard,more,bref

Author

Patrick De Geest, Nov 15 2000

Status

approved