A053885 Squares composed of digits {1,2,7}.
1, 121, 2217121, 21127711127121, 17177711172112177722222121, 17117772217211221211117217772227121
Offset: 1
Links
- P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
- Hisanori Mishima, Sporadic tridigital solutions
Crossrefs
Cf. A053884.
Extensions
One more term from Jon E. Schoenfield, Sep 03 2006
One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 23 2007
Comments