1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Combinatorics, I guess

  1. Apr 11, 2005 #1
    Given a Natural number K, how many combinations [tex]\[
    x = \left( {x_1 ,...,x_N } \right)
    [/tex] of Natural numbers vectors are there, so that [tex]\[
    \sum\limits_{i = 1}^N {x_i ^2 } = K

    I'm desparate and will believe anything... :yuck:
  2. jcsd
  3. Apr 11, 2005 #2

    matt grime

    User Avatar
    Science Advisor
    Homework Helper

  4. Apr 11, 2005 #3
    Thanks. These were 5 very scary minutes.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Combinatorics, I guess
  1. Combinatorics problem (Replies: 8)

  2. Combinatorics Sum (Replies: 8)

  3. Combinatorics problem (Replies: 4)