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%I A088191 #3 Dec 08 2015 23:59:19
%S A088191 0,3,0,5,3,4,1,1,10,0,8,4,1,1,10,5,3,5,-1,8,4,5,7,8,4,0,5,3,4,12,5,7,
%T A088191 1,11,0,8,5,1,10,5,3,4,8,4,0,13,11,5,3,4,0,8,9,7,2,10,0,8,4,1,11,13,
%U A088191 -5,12,4,13,7,9,3,4,0,12,8,5,1,10,8,4,8,9,3,4,8,4,5,7,8,4,0,5,1,18,5,8,1,10,12,1,19
%N A088191 First differences of A088190.
%C A088191 Seemingly the difference sequence is mostly positive. There are special characteristic features where it is nonpositive. (See A088193-A088195.)
%o A088191 (PARI) qrp_d(to)= {/* Difference sequence of the largest QR modulo the primes */ local(m,k=1,p,v=[]); for(i=2,to,m=1; p=prime(i); j=2; while((j<=(p-1)/2)&&(m<p-1),m=max(m,(j^2)%p); j++); v=concat(v,m-k); k=m); print(v) }
%Y A088191 Cf. A088190, A088192, A088193, A088194, A088195.
%K A088191 easy,sign
%O A088191 1,2
%A A088191 Ferenc Adorjan (fadorjan(AT)freemail.hu), Sep 22 2003

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