A053934 Numbers k such that k^2 contains only digits {2,8,9}.
3, 17, 173, 2983, 298327, 1732017, 5412290577, 9964933517, 5405829167667, 17320185602062360469701767
Offset: 1
Links
- Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences
- Author?, Source, (txt)
Crossrefs
Cf. A053935.
Programs
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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 *)
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
Comments