A053933 Squares composed of digits {2,7,9}.

9, 729, 29929, 277729, 27279729, 7227299772979729, 7977797272977277729, 27792277722299977929, 222227722297792922929, 722979227797229279772792797979272222799797729799272929

Offset

1,1

Links

Table of n, a(n) for n=1..10.

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

Hisanori Mishima, Sporadic tridigital solutions.

Author?, Source, (txt)

Formula

a(n) = A053932(n)^2. - Elmo R. Oliveira, Jul 18 2025

Crossrefs

Cf. A053932.

Sequence in context: A255259 A191367 A189821 * A145262 A154026 A013714

Adjacent sequences: A053930 A053931 A053932 * A053934 A053935 A053936

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 2000

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005

a(10) from Zhao Hui Du, Mar 10 2024

Status

approved