A030174 Squares composed of digits {1,2,3}.
1, 121, 12321, 1322122321, 132233322321, 213223221121, 13223121322321, 1212111311221321, 131332121232312121, 31121322221111133211321, 3322133322121313132333322321, 12232213113321121113332133323121, 3231221313313311221231322223122312333121, 311323333121312322332133323111223321313321
Offset: 1
Links
- Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences.
- Hisanori Mishima, Sporadic tridigital solutions.
- Eric Weisstein's World of Mathematics, Square Number.
- Author?, Source(txt)
Crossrefs
Cf. A030175.
Formula
a(n) = A030175(n)^2. - Elmo R. Oliveira, Jul 17 2025
Extensions
More terms from Patrick De Geest, Mar 15 2000.
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005
a(13)-a(14) from Mishima's website added by Elmo R. Oliveira, Jul 17 2025