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A046037 Numbers n for which floor((3/2)^n) is composite. 1


%S 8,9,10,11,12,13,14,15,16,17,18,19,20,23,24,25,26,27,28,29,30,31,32,

%T 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,

%U 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78

%N Numbers n for which floor((3/2)^n) is composite.

%D R. K. Guy, Unsolved Problems in Number Theory, E19.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/FloorFunction.html">Floor Function</a>

%t Select[Range[100],CompositeQ[Floor[(3/2)^#]]&] (* _Harvey P. Dale_, Sep 23 2014 *)

%o (PARI) is(n)=n>7&&!isprime(floor(1.5^n)) \\ _Charles R Greathouse IV_, Oct 27 2011

%K nonn

%O 1,1

%A _Eric W. Weisstein_

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Last modified August 11 09:54 EDT 2020. Contains 336423 sequences. (Running on oeis4.)