%I A039660
%S A039660 0,0,0,1,2,8,14,43,72,204,336,926,1516,4144,6772,18504,30236,82844,
%T A039660 135452,372581,609710,1684220,2758730,7652531,12546332,34941752,
%U A039660 57337172,160280987,263224802,738363872,1213502942,3414804517
%N A039660 Related to enumeration of edge-rooted catafusenes.
%D A039660 S. J. Cyvin et al., Enumeration and classification of benzenoid systems. 
               32. Normal perifusenes with two internal vertices, J. Chem. Inform. 
               Comput. Sci., 32 (1992), 532-540.
%F A039660 G.f.: (1+x)[1-6x^2+7x^4-(1-3x^2)sqrt(1-6x^2+5x^4)]/[2x^4(1-x)] (eq. (11) 
               in Cyvin et al.)
%Y A039660 Sequence in context: A046959 A086177 A162484 this_sequence A119752 A111001 
               A055258
%Y A039660 Adjacent sequences: A039657 A039658 A039659 this_sequence A039661 A039662 
               A039663
%K A039660 nonn
%O A039660 1,5
%A A039660 N. J. A. Sloane (njas(AT)research.att.com).
%E A039660 More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 14 2004