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Jun 20th, 2018
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  1. N = 80;
  2. a = vector(N); a[1]=1;
  3. for( k = 1, N-1, { a[k+1] = k*eulerphi(a[k])+a[eulerphi(k)];});
  4. a;
  5. b = vector(N);
  6. for( k = 1, N, { b[k] = log(a[k]);});
  7. x = vector(N); for( k = 1, N, { x[k] = k;});
  8. plothraw(x,b)
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