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A036512 Smallest square containing exactly n 5's. 3
25, 5625, 55225, 555025, 505575225, 525555625, 55255554225, 255555525625, 5552545555456, 555505585935556, 51560555559555025, 455516555553551556, 15455545578525555556, 55505555659555755625, 1597555555555855545225, 275555535501555955575556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(20) > 10^28. - Giovanni Resta, Jul 27 2018

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..19

MATHEMATICA

a[n_] := Block[{k=1}, While[DigitCount[k^2, 10, 5] != n, k++]; k^2]; Array[a, 6] (* Giovanni Resta, Jul 27 2018 *)

CROSSREFS

Cf. A048350. - Jon E. Schoenfield, Jan 24 2009

Sequence in context: A185826 A178026 A012748 * A053860 A091744 A061111

Adjacent sequences:  A036509 A036510 A036511 * A036513 A036514 A036515

KEYWORD

nonn,base

AUTHOR

David W. Wilson

EXTENSIONS

More terms from Jon E. Schoenfield, Jan 14 2009

a(16) from Giovanni Resta, Jul 27 2018

STATUS

approved

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Last modified January 19 15:53 EST 2019. Contains 319307 sequences. (Running on oeis4.)