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A063682 Number of 2-trees rooted at an asymmetric end-edge. 0

%I

%S 0,1,3,13,52,229,1024,4749,22454,108299,529896,2625903,13148268,

%T 66428383,338197609,1733399552,8936746984,46315049443,241146306914,

%U 1260805087503,6616786338256,34843842405490,184057255372576

%N Number of 2-trees rooted at an asymmetric end-edge.

%D F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973, p. 75, Eq. (3.5.4).

%Y Cf. A058870, A058866, A054581.

%K nonn

%O 1,3

%A _Vladeta Jovovic_, Aug 22 2001

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Last modified May 8 20:32 EDT 2021. Contains 343668 sequences. (Running on oeis4.)