A053930 Numbers k such that k^2 contains only digits {2,6,9}.

3, 173, 264, 964, 3114, 31563, 163187, 264437, 16431563, 96032404423, 99647694036, 9813067816077, 51665201022187, 51960847753114, 7935361806302386, 78883604126137785577, 47567102808870567435673, 26395073915340646948470264

Offset: 1

Author

Patrick De Geest, Mar 15 2000

Keywords

• nonn
• base

Links

• Joe K. Crump, TriDigital Squares
• Patrick De Geest, Squares containing at most three distinct digits, Index entries for related sequences

Crossrefs

Cf. A053931.

Programs

PARI

isok(n) = {digs = digits(n^2); for (i = 1, #digs, if ((digs[i] != 2) && (digs[i] != 6) && (digs[i] != 9), return (0));); return (1);} \\ Michel Marcus, Sep 02 2013

Extensions

More terms from Joe K. Crump (joecr(AT)carolina.rr.com), Sep 07 2000

a(17)-a(19) from Zhao Hui Du, Mar 01 2024