This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A088194 #8 Mar 14 2018 03:51:06
%S A088194 0,0,0,-1,0,0,0,0,0,-5,0,0,0,0,0,0,-1,0,0,0,0,0,-10,-1,0,0,0,0,0,0,-7,
%T A088194 0,-4,0,-1,0,-5,0,0,0,0,0,-7,0,-4,0,0,0,0,0,-4,0,0,-2,0,-1,0,-5,0,0,0,
%U A088194 0,-8,0,0,0,0,-4,-11,0,0,0,-1,0,-2,0,0,0,0,0,0,0,0,0,0,-2,-5,0,0,0,0,-5,0,0,-5,0,0,0,-1
%N A088194 Members of the difference sequence (A088191) of the sequence of largest quadratic residues modulo the primes (A088190), where the latter is non-monotonic.
%C A088194 The negative values are either primes or composites (Cf. A088200).
%o A088194 (PARI) qrp_d_nm(to)= {/* The difference sequence values where the sequence of the largest QR modulo the primes is non-monotonic */ 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++); if((m-k)<=0,v=concat(v,m-k)); k=m); print(v) }
%Y A088194 Cf. A088190, A088191, A088192, A088193, A088195.
%K A088194 easy,sign
%O A088194 1,10
%A A088194 Ferenc Adorjan (fadorjan(AT)freemail.hu), Sep 22 2003