A053890 Numbers k such that k^2 contains only digits {1,3,4}.
1, 2, 12, 21, 38, 1188, 20771, 37962, 3378512, 11594538, 65833989271, 3798830532038, 575684923751188, 21079405433537116521, 177324875114669443080086908188
Offset: 1
Links
- Author?, Squares with at most three types of digits (txt)
- Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences
- H. Mishima, Sporadic tridigital solutions
Crossrefs
Cf. A053891.
Programs
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Mathematica
Select[Range[1, 10000], ContainsOnly[IntegerDigits[#^2], {1, 3, 4}] &] (* Julien Kluge, Jul 08 2016 *)
Extensions
More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
One more term from Jon E. Schoenfield, Sep 03 2006
Two more terms from Mishima's page added by Max Alekseyev, Jan 28 2012
a(15) from Zhao Hui Du, Mar 06 2024
Comments