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%I #4 Oct 01 2013 17:57:45
%S 158,239,292,502,542,631,1203,1381,2189,2461,2797,2949,3190,3494,3537,
%T 4849,4883,5053,6140,6619,6730,6761,7557,7604,8912,8961,9018,9043,
%U 9109,9253,9289,9316,9733,10142,10409,10652,11515,12231,12234,12653,13472
%N p such that p^4 + q^4 = r^4 + s^4 = a(n).
%H D. J. Bernstein, <a href="http://cr.yp.to/sortedsums/two4.1000000">List of 516 primitive solutions p^4 + q^4 = r^4 + s^4</a>
%Y Cf. A003824, A088665.
%K fini,nonn
%O 1,1
%A _Cino Hilliard_, Nov 22 2003
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