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 A145158 #4 Aug 08 2014 15:30:14
%S A145158 1,1,3,16,121,1143,12570,154551,2072547,29829412,455731327,7332989616,
%T A145158 123548350018,2169987439342,39595583375433,748541216196285,
%U A145158 14628467191450947,294984129900772611,6128372452917891216
%N A145158 G.f. A(x) satisfies A(x/A(x)^2) = 1/(1-x).
%H A145158 Vaclav Kotesovec, <a href="/A145158/b145158.txt">Table of n, a(n) for n = 0..160</a>
%F A145158 G.f. satisfies: 1 - 1/A(x) = x*A( 1 - 1/A(x) )^2.
%F A145158 Self-convolution yields A145159.
%e A145158 G.f.: A(x) = 1 + x + 3*x^2 + 16*x^3 + 121*x^4 + 1143*x^5 +...
%e A145158 x/A(x)^2 = x - 2*x^2 - 3*x^3 - 18*x^4 - 150*x^5 - 1518*x^6 -...
%e A145158 1/A(x) = 1 - x - 2*x^2 - 11*x^3 - 88*x^4 - 869*x^5 - 9876*x^6 -...
%e A145158 Series_Reversion[x/A(x)^2] = x + 2*x^2 + 11*x^3 + 88*x^4 + 869*x^5 +...
%o A145158 (PARI) {a(n)=local(A=1+x+x*O(x^n));for(n=0,n,B=serreverse(x/A^2);A=1/(1-B));polcoeff(A,n)}
%Y A145158 Cf. A145161 (A^3); A088713, A145160, A145162, A145165, A145167.
%K A145158 nonn
%O A145158 0,3
%A A145158 _Paul D. Hanna_, Oct 03 2008