A036513 Smallest square containing exactly n 6's.

16, 676, 46656, 1666681, 26666896, 4666665969, 26661664656, 616686666436, 12666666068676, 696626660666596, 16666569616666761, 64666665664666569, 666566667666656964, 16656666666663616576, 6466267667066666666596, 46366666666326666766276

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

Example

a(n) = A048351(n)^2.

Mathematica

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

Crossrefs

Cf. A048351. - Jon E. Schoenfield, Jan 24 2009

Sequence in context: A014733 A053907 A222139 * A123824 A198283 A283534

Adjacent sequences: A036510 A036511 A036512 * A036514 A036515 A036516

Keyword

nonn,base

Author

David W. Wilson

Extensions

a(13)-a(15) from Jon E. Schoenfield, Jan 14 2009

a(16) from Giovanni Resta, Jul 27 2018

Status

approved