A053921 Squares composed of digits {2,3,9}.

9, 29929, 332929, 3323329, 23299929, 9222293933329, 39333932392329, 9222322299923929, 32299993392299929223929, 33932323229239993922329, 29323939329333323299399329, 3292922993992939999922923222293922929, 223222929323939222223332232999233932329

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.

Hisanori Mishima, Squares consisted of 3 different digits.

Formula

a(n) = A053920(n)^2. - Elmo R. Oliveira, Jul 17 2025

Crossrefs

Cf. A053920.

Sequence in context: A055309 A288940 A053931 * A297563 A234641 A242853

Adjacent sequences: A053918 A053919 A053920 * A053922 A053923 A053924

Keyword

nonn,base

Author

Patrick De Geest, Mar 15 2000

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005

a(11) term from Jon E. Schoenfield, Sep 04 2006

a(12) term from Mishima's page added by Max Alekseyev, Mar 12 2009

a(13) from Mishima's website added by Elmo R. Oliveira, Jul 17 2025

Status

approved