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%I #8 May 24 2018 18:06:47
%S 1,1,5,12,40,106,317,868,2462,6778,18801,51561,141583,386865,1056815,
%T 2880894,7850318,21373466,58182244,158342918,430954506,1173001715,
%U 3193466631,8696388412,23689689323,64555962710,175989086913,479971320862,1309581740793,3574715516111
%N Number of monocyclic skeletons with n carbon atoms and a ring size of 6.
%D Camden A. Parks and James B. Hendrickson, Enumeration of monocyclic and bicyclic carbon skeletons, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).
%H Andrew Howroyd, <a href="/A120779/b120779.txt">Table of n, a(n) for n = 6..200</a>
%Y Column k=6 of A305059.
%K nonn
%O 6,3
%A _Parthasarathy Nambi_, Aug 13 2006
%E More terms from _N. J. A. Sloane_, Aug 27 2006
%E Terms a(26) and beyond from _Andrew Howroyd_, May 24 2018
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