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 A107588 #3 Mar 30 2012 18:36:46
%S A107588 1,1,-2,8,-42,258,-1764,13070,-103262,860812,-7516306,68380986,
%T A107588 -645635800,6307334042,-63602862362,660771763808,-7061440267362,
%U A107588 77524521343282,-873398761544252,10087973928531918,-119358929179189278,1445596845096459108,-17909930113246116338
%N A107588 G.f. satisfies: A(x) = 1 + ( x/A(x) )/A( x/A(x) ).
%F A107588 G.f.: A(x) = 1/G088714(-x), where G088714(x) is the g.f. of A088714.
%o A107588 (PARI) {a(n)=local(A=1+x+x*O(x^n)); for(k=1,n,A=1+subst(x/A,x,x/A));polcoeff(A,n)}
%Y A107588 Cf. A088714.
%K A107588 sign
%O A107588 0,3
%A A107588 _Paul D. Hanna_, May 17 2005