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 A088930 #3 Mar 30 2012 18:36:39 %S A088930 1,2,4,9,23,67,220,795,3086,12633,53844,236833,1068313,4919512, %T A088930 23047579,109563206,527401808,2566472416,12608536729,62465984781, %U A088930 311796289951,1566778163225,7920718997762,40261922412697,205675725994566 %N A088930 Sum of first n terms of A(x)^n is A087457(n) for n>=1. %C A088930 A087457 gives number of odd length roads between any adjacent nodes in virtual optimal chordal ring of degree 3. %e A088930 Given a(1)=1 and a(1)=2, then a(2)=4 since sum of first 3 coefficients of %e A088930 A(x)^3=1+6x+24x^2+... equals 1+6+24 = 31 = A087457(3). %Y A088930 Cf. A087457, A088929. %K A088930 nonn %O A088930 0,2 %A A088930 _Paul D. Hanna_, Oct 24 2003