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Sum of 15 but no fewer nonzero fourth powers.
4

%I #9 Apr 10 2017 23:40:39

%S 15,30,45,60,75,95,110,125,140,155,175,190,205,220,235,240,255,270,

%T 285,300,315,335,350,365,380,395,415,430,445,460,475,480,495,510,525,

%U 540,555,575,590,605,620,639,655,670,685,700,719,720,735,750,765,780,799

%N Sum of 15 but no fewer nonzero fourth powers.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/BiquadraticNumber.html">Biquadratic Number.</a>

%Y Cf. A000583, A002377, A046045.

%K nonn

%O 1,1

%A _Eric W. Weisstein_

%E More terms from Arlin Anderson (starship1(AT)gmail.com)