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A238304 Number of monic quartic polynomials with coefficients from {1..n} and maximum coefficient equal to n, for which all four roots are integers.

%I A238304 #7 Feb 24 2014 10:27:18
%S A238304 0,0,0,0,0,1,0,0,1,0,0,1,1,0,1,0,1,1,0,1,1,1,0,2,0,0,2,1,0,1,1,2,1,0,
%T A238304 0,2,1,1,2,1,0,2,0,2,2,0,1,1,1,1,1,3,0,2,0,1,2,1,1,4,1,1,1,1,0,2,2,2,
%U A238304 2,0,1,3,1,0,1,3,1,2,0,2,2,2,1,4,1,0,3,1,0,1,0,5,2,3,1,2,2,0,2,1,1,3,1,2,2,1,2,5
%N A238304 Number of monic quartic polynomials with coefficients from {1..n} and maximum coefficient equal to n, for which all four roots are integers.
%C A238304 Among first 10000 terms the largest is a(8640) = 174.
%C A238304 Also a(n) = 0 for n = 1,2,3,4,5,7,8,10,11,14,16,19,23,25,26,29,34,35,41,43,46,53,55,65,70,74,79,86,.. (329 terms among first 10000 terms.)
%H A238304 Zak Seidov, <a href="/A238304/b238304.txt">Table of n, a(n) for n = 1..10000</a>
%Y A238304 Cf. A238097.
%K A238304 nonn
%O A238304 1,24
%A A238304 _Zak Seidov_, Feb 24 2014