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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]\[
    \sum\limits_{i = 1}^N {x_i ^2 } = K
    \]
    [/tex]?

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

    matt grime

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  4. Apr 11, 2005 #3
    Thanks. These were 5 very scary minutes.
     
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