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A053885
Squares composed of digits {1,2,7}.
2
1, 121, 2217121, 21127711127121, 17177711172112177722222121, 17117772217211221211117217772227121
OFFSET
1,2
COMMENTS
The least significant, i.e., rightmost, digit must be 1. - Harvey P. Dale, Jan 05 2022
CROSSREFS
Cf. A053884.
Sequence in context: A082215 A123179 A245593 * A068490 A077735 A068121
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Mar 15 2000
EXTENSIONS
One more term from Jon E. Schoenfield, Sep 03 2006
One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 23 2007
STATUS
approved