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%I #5 Sep 08 2022 08:45:53
%S 1,7,12,15,16,17,31,32,45,49,56,60,65,71,72,77,80,81
%N Numbers n such that quartic curve y^2=x^4-n has integral points.
%C Complement to this sequence see A177989.
%C Numbers n such that quartic curve y^2=x^4+n has integral points. see A177986.
%o (Magma) IntegralQuarticPoints([1,0,0,0,-81]);
%Y Cf. A054504, A081121, A177986, A177987, A177988, A177989.
%K nonn
%O 1,2
%A _Artur Jasinski_, May 16 2010
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