A053888 Numbers k such that k^2 contains only digits {1,2,9}.

1, 3, 11, 173, 3161, 34827, 43923, 44623, 54123, 1108661, 9603239, 14832161, 9960980373, 1513668461761, 99961098929489127, 459556524411439511, 145303131149776986249167839

Offset

1,2

Links

Table of n, a(n) for n=1..17.

Author?, Source(txt)

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

H. Mishima, Squares consisting of 3 different digits

Crossrefs

Cf. A053889.

Sequence in context: A140538 A006485 A003115 * A118479 A103836 A284704

Adjacent sequences: A053885 A053886 A053887 * A053889 A053890 A053891

Keyword

nonn,base,more

Author

Patrick De Geest, Mar 15 2000

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 webpage added by Max Alekseyev, Jun 17 2011

a(17) from Zhao Hui Du, Feb 29 2024

Status

approved