A058474 Squares composed of digits {0,1,9}, not ending with zero.

1, 9, 1909190001999001011109190090109911991001, 10199000091990191001091091099001091999900190199000001

Offset

1,2

Links

Table of n, a(n) for n=1..4.

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, pp. 29-81.

Hisanori Mishima, Sporadic tridigital solutions.

Formula

a(n) = A058473(n)^2. - Elmo R. Oliveira, Jul 17 2025

Crossrefs

Cf. A058473.

Sequence in context: A058448 A058454 A058472 * A285476 A270035 A228636

Adjacent sequences: A058471 A058472 A058473 * A058475 A058476 A058477

Keyword

nonn,base,more

Author

Patrick De Geest, Nov 15 2000

Extensions

a(4) from Zhao Hui Du, Feb 29 2024

Status

approved