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%I #5 Jul 15 2018 13:06:55
%S 0,0,0,1,0,1,0,0,0,0,0,2,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,
%T 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0,0,2,0,0,0,0,0,0,0,0,
%U 0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,1,0,0,0
%N Define the signature symmetry of a number n to be k if n-r and n+r have the same prime signature for r = 1 to k but not for k+1. Sequence contains the signature symmetry of n.
%C Subsidiary sequence: Index of the first occurrence of n in this sequence.
%e a(12) = 2 as 11 and 13 are both prime 10 and 14 both have prime signature p*q but 9 and 15 have distinct prime signature.
%Y Cf. A093489, A093491, A093492.
%K nonn
%O 1,12
%A _Amarnath Murthy_, Apr 16 2004
%E More terms from _Joshua Zucker_, Jul 24 2006
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