A036515 Smallest square containing exactly n 8's.

81, 6889, 88804, 1898884, 78818884, 878588881, 88888055881, 388888184881, 86888087818884, 788088668888889, 8858888198858889, 108818889888588889, 18848488888038898881, 868968788888888880481, 3888888880378818878884, 22886882888858888885881

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