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%I #2 Mar 31 2012 14:40:08
%S 0,0,0,1,1,1,2,4,4,4
%N First component x of pairs (x,y) where x!+y! is a square, sorted on x.
%C Conjecture: the only solutions for x!+y!=n^2 are x=0,0,0,1,1,1,2,4,4,4 and y=4,5,7,4,5,7,2,0,1,5 respectively.
%Y Added as a companion to A082871.
%K nonn
%O 1,7
%A _Farideh Firoozbakht_, Jul 07 2009