Search: id:A099380
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%I A099380
%S A099380 0,0,2,0,8,3,6,0,24,0,16,0,24,5,14,9,64,5,18,0,52,0,22,0,72,30,36,0,56,
%T A099380 7,48,0,160,0,44,21,72,7,38,15,144,9,42,0,88,27,46,0,192,0,110,15,124,
               9,
%U A099380 54,33,168,0,72,0,156,11,62,0,384,64,66,0,156,0,112,0,216,11,88,90,152
%N A099380 The imaginary part of -n', the arithmetic derivative for Gaussian integers.
%C A099380 a(n) is zero when n is 0, 1, or the product of Gaussian primes (A002145).
%D A099380 See A09379
%H A099380 T. D. Noe, <a href="b099380.txt">Table of n, a(n) for n=0..2048</a>
%t A099380 (* see A099379 for the definition of the di function *) Im[Table[ -di[n], 
               {n, 0, 100}]]
%Y A099380 Cf. A003415 (arithmetic derivative of n), A099379 (real part of the Gaussian-integer 
               derivative of n).
%Y A099380 Sequence in context: A159810 A146543 A021052 this_sequence A154909 A020780 
               A096609
%Y A099380 Adjacent sequences: A099377 A099378 A099379 this_sequence A099381 A099382 
               A099383
%K A099380 nice,nonn
%O A099380 0,3
%A A099380 T. D. Noe (noe(AT)sspectra.com), Oct 14 2004

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