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A053934
Numbers k such that k^2 contains only digits {2,8,9}.
1
3, 17, 173, 2983, 298327, 1732017, 5412290577, 9964933517, 5405829167667, 17320185602062360469701767
OFFSET
1,1
MATHEMATICA
Table[Select[Sqrt[FromDigits/@Tuples[{2, 8, 9}, n]], IntegerQ], {n, 15}]//Flatten (* The program generates the first six terms of the sequence. To generate more, increase the "n" constant but the program will take a long time to run. *) (* Harvey P. Dale, Nov 19 2023 *)
CROSSREFS
Cf. A053935.
Sequence in context: A214346 A015083 A263460 * A159592 A126443 A054976
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
One more term from Jon E. Schoenfield, Sep 04 2006
a(10) from Zhao Hui Du, Mar 09 2024
STATUS
approved