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A030174 Squares composed of digits {1,2,3}. 3
1, 121, 12321, 1322122321, 132233322321, 213223221121, 13223121322321, 1212111311221321, 131332121232312121, 31121322221111133211321, 3322133322121313132333322321, 12232213113321121113332133323121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

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

Author?, Source(txt)

Hisanori Mishima, Sporadic tridigital solutions

Eric Weisstein's World of Mathematics, Square Number.

CROSSREFS

Cf. A030175.

Sequence in context: A261570 A068117 A080162 * A180153 A178510 A066625

Adjacent sequences:  A030171 A030172 A030173 * A030175 A030176 A030177

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

EXTENSIONS

More terms from the author, Mar 15 2000.

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005

STATUS

approved

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Last modified December 12 12:30 EST 2019. Contains 329958 sequences. (Running on oeis4.)