%I #4 Oct 01 2013 17:57:45
%S 59,7,193,271,103,222,76,878,1324,1042,248,1034,1577,1623,661,3364,
%T 2694,604,2027,274,2707,498,1259,5181,1657,6262,4903,5098,635,1104,
%U 1142,173,5452,3401,5277,3779,3644,2903,1525,1149,5121,5526,6470,6496,261,581
%N q 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, A088728, A088867.
%K fini,nonn
%O 1,1
%A _Cino Hilliard_, Nov 23 2003