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A096483 Integer part of the square root of n-th decimal repunit. 3
1, 3, 10, 33, 105, 333, 1054, 3333, 10540, 33333, 105409, 333333, 1054092, 3333333, 10540925, 33333333, 105409255, 333333333, 1054092553, 3333333333, 10540925533, 33333333333, 105409255338, 333333333333, 1054092553389 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..1998

FORMULA

a[n]=Floor[sqrt[(-1+10^n)/9]].

If n is even, a(n) = (10^(n/2)-1)/3. - Robert Israel, Nov 13 2017

MAPLE

seq(floor(sqrt((10^n-1)/9)), n=1..100); # Robert Israel, Nov 13 2017

MATHEMATICA

Floor[Sqrt[#]]&/@Table[FromDigits[PadRight[{}, n, 1]], {n, 30}] (* Harvey P. Dale, Sep 24 2016 *)

CROSSREFS

Sequence in context: A121523 A115240 A027989 * A093043 A061566 A082398

Adjacent sequences:  A096480 A096481 A096482 * A096484 A096485 A096486

KEYWORD

base,nonn

AUTHOR

Labos Elemer, Jun 24 2004

STATUS

approved

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Last modified January 22 09:39 EST 2022. Contains 350481 sequences. (Running on oeis4.)