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A073890 Numerator of n/floor(sqrt(n)). 4

%I

%S 1,2,3,2,5,3,7,4,3,10,11,4,13,14,5,4,17,9,19,5,21,11,23,6,5,26,27,28,

%T 29,6,31,32,33,34,7,6,37,19,13,20,41,7,43,22,15,23,47,8,7,50,51,52,53,

%U 54,55,8,57,58,59,60,61,62,9,8,65,33,67,17,69,35,71,9,73,37,75,19,77

%N Numerator of n/floor(sqrt(n)).

%C Denominator is A075119(n).

%H Reinhard Zumkeller, <a href="/A073890/b073890.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = n/A067815(n).

%o (Haskell)

%o import Data.Ratio ((%), numerator)

%o a073890 n = numerator $ n % a000196 n

%o -- _Reinhard Zumkeller_, Jul 08 2014

%o (PARI) a(n) = numerator(n/sqrtint(n)); \\ _Michel Marcus_, Dec 19 2017

%Y Cf. A000196, A067815, A075119 (denominator).

%K nonn,frac,look

%O 1,2

%A _Reinhard Zumkeller_, Sep 03 2002

%E Denominator reference fixed by _Reinhard Zumkeller_, Jul 08 2014

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Last modified May 26 17:17 EDT 2019. Contains 323597 sequences. (Running on oeis4.)