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 A132835 #2 Mar 30 2012 18:37:04
%S A132835 1,3,9,25,75,225,674,2022,6066,18196,54588,163764,491291,1473873,
%T A132835 4421619,13264856,39794568,119383704,358151111,1074453333,3223359999,
%U A132835 9670079995,29010239985,87030719955,261092159865,783276479595
%N A132835 Largest terms a(n) forming a self-convolution cube of an integer sequence (A132836) such that: a(n) <= 3*a(n-1) for n>0 with a(0)=1.
%o A132835 (PARI) {a(n)=local(B=[1],R);if(n==0,1,for(k=1,n,t=3*a(k-1);B=concat(B,t); R=Vec(Ser(B)^(1/3))[ #B]; B[ #B]=t-(numerator(R)%3)*(denominator(R)-1)/2 ));B[n+1]}
%Y A132835 Cf. A132836 (cube-root); A132831 (variant).
%K A132835 nonn
%O A132835 0,2
%A A132835 _Paul D. Hanna_, Sep 07 2007