A058428 Squares composed of digits {0,2,9}, not ending with zero.
9, 2209, 29929, 299209, 2900209, 290200922209, 2999229009299090209220929, 9009222020020222999909020009, 9290090909029029202290909290992929, 22922009029909029220029029909020009, 22220990020022929092929022220290920900929
Offset: 1
Links
- Patrick De Geest, Index to related sequences.
- Hisanori Mishima, Sporadic tridigital solutions.
Crossrefs
Cf. A058427.
Formula
a(n) = A058427(n)^2. - Elmo R. Oliveira, Jul 16 2025
Extensions
a(10) from Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 30 2008
a(11) from Mishima's website added by Elmo R. Oliveira, Jul 16 2025