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  1. f(n,v)=abs(sum(k=1,n-1,binomial(n-1,k)*stirling(k,v-1,1)*stirling(n-k-1,v-1,1)))
  2.  
  3. print(f(3,2));
  4. print(f(5,3));
  5. print(f(10,4));
  6. print(f(40,10));
Success #stdin #stdout #stderr 0.01s 9288KB
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stdin
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Standard input is empty
stdout
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2
6
90720
192999500979320621703647808413866514749680
stderr
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  ***   Warning: can't expand ~.
  ***   Warning: can't expand ~.
https://ideone.com/a0kj7g
http://c...content-available-to-author-only...e.com/questions/50053/order-40-sticks
language:
PARI/GP (2.5.1)
created:
8 years ago
visibility:
public

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