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 A092152 #11 Jul 27 2018 20:15:49 %S A092152 1,-1,-1,1,-1,1,-1,0,0,1,-1,-1,-1,1,1,0,-1,0,-1,-1,1,1,-1,0,0,1,0,-1, %T A092152 -1,-1,-1,0,1,1,1,0,-1,1,1,0,-1,-1,-1,-1,0,1,-1,0,0,0,1,-1,-1,0,1,0,1, %U A092152 1,-1,1,-1,1,0,0,1,-1,-1,-1,1,-1,-1,0,-1,1,0,-1,1,-1,-1,0,0,1,-1,1,1,1,1,0,-1,0,1,-1,1,1,1,0,-1,0,0,0,-1,-1,-1,0,-1,1 %N A092152 Sign of A092673(n). %C A092152 Multiplicative because A092673 is. - _Andrew Howroyd_, Jul 27 2018 %H A092152 Antti Karttunen, <a href="/A092152/b092152.txt">Table of n, a(n) for n = 1..10000</a> %F A092152 a(2*n) = sign(mu(2*n) - mu(n)); a(2*n + 1) = mu(2*n + 1). - _Andrew Howroyd_, Jul 27 2018 %o A092152 (PARI) a(n)=sign(moebius(n) - if(n%2, 0, moebius(n/2))) \\ _Andrew Howroyd_, Jul 27 2018 %Y A092152 Cf. A092673. %K A092152 sign,mult %O A092152 1,1 %A A092152 _Jon Perry_, Mar 31 2004