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A036515 Smallest square containing exactly n 8's. 4
81, 6889, 88804, 1898884, 78818884, 878588881, 88888055881, 388888184881, 86888087818884, 788088668888889, 8858888198858889, 108818889888588889, 18848488888038898881, 868968788888888880481, 3888888880378818878884, 22886882888858888885881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(21) > 10^28. - Giovanni Resta, Jul 27 2018

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..20

MATHEMATICA

a[n_] := Block[{k=1}, While[DigitCount[k^2, 10, 8] != n, k++]; k^2]; Array[a, 6] (* Giovanni Resta, Jul 27 2018 *)

CROSSREFS

Cf. A048353. - Jon E. Schoenfield, Jan 24 2009

Sequence in context: A089683 A183506 A099372 * A223553 A185770 A222441

Adjacent sequences:  A036512 A036513 A036514 * A036516 A036517 A036518

KEYWORD

nonn,base

AUTHOR

David W. Wilson

EXTENSIONS

More terms from Jon E. Schoenfield, Jan 24 2009

a(16) from Giovanni Resta, Jul 27 2018

STATUS

approved

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Last modified May 22 00:02 EDT 2022. Contains 353931 sequences. (Running on oeis4.)