A186659 Total number of positive integers below 10^n requiring 7 positive biquadrates in their representation as sum of biquadrates.

1, 6, 83, 1101, 12813, 135273, 1242976, 10072614, 81753935, 720313380, 6785033130

Offset

1,2

Comments

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).

Links

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Waring's Problem.

Crossrefs

Cf. A003341, A186660.

Sequence in context: A112462 A283198 A186661 * A196256 A230491 A067249

Adjacent sequences: A186656 A186657 A186658 * A186660 A186661 A186662

Keyword

nonn,more

Author

Martin Renner, Feb 25 2011

Extensions

a(5)-a(8) from Lars Blomberg, May 08 2011

a(9) from Hiroaki Yamanouchi, Oct 13 2014

a(10)-a(11) from Giovanni Resta, Apr 26 2016

Status

approved