A186659 - OEIS

%I #19 Apr 29 2016 04:18:09

%S 1,6,83,1101,12813,135273,1242976,10072614,81753935,720313380,

%T 6785033130

%N Total number of positive integers below 10^n requiring 7 positive biquadrates in their representation as sum of biquadrates.

%C A114322(n) + A186649(n) + A186651(n) + A186653(n) + A186655(n) + A186657(n) + a(n) + A186661(n) + A186663(n) + A186665(n) + A186667(n) + A186669(n) + A186671(n) + A186673(n) + A186675(n) + A186677(n) + A186680(n) + A186682(n) + A186684(n) = A002283(n).

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

%Y Cf. A003341, A186660.

%K nonn,more

%O 1,2

%A _Martin Renner_, Feb 25 2011

%E a(5)-a(8) from _Lars Blomberg_, May 08 2011

%E a(9) from _Hiroaki Yamanouchi_, Oct 13 2014

%E a(10)-a(11) from _Giovanni Resta_, Apr 26 2016