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%I #2 Mar 31 2012 10:22:16
%S 1,3,4,8,9,15,16,19,20,24,25,28,33,35,36,40,48,49,51,63,64,65,68,73,
%T 80,81,84,99,100,104
%N Numbers n such that quartic curve y^2=x^4+n have integral points.
%C To this sequence belonging as subset all perfect squares and squares-1.
%C Complement to this sequence see A177987.
%Y Cf. A054504, A081121.
%K nonn
%O 1,2
%A _Artur Jasinski_, May 16 2010