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%I #7 Jan 11 2024 03:04:00
%S 0,1,2,3,5,6,7,11,12,15,16,18,20,29,30,32,34,39,40,43,47,48,49,53,55,
%T 57,81,82,85,89,90,91,95,97,99,113,114,116,118,123,124,136,137,139,
%U 140,141,143,146,155,159,160,161,165,167,173,183,245,246,248,250,255,256,268
%N A014486-indices of the trees whose interior zigzag-tree (Stanley's c) is branch-reduced (in the sense defined by Donaghey).
%H Robert Donaghey, <a href="https://doi.org/10.1016/0095-8956(80)90045-3">Automorphisms on Catalan trees and bracketing</a>, J. Combin. Theory, Series B, 29 (1980), 75-90.
%H R. P. Stanley, <a href="http://www-math.mit.edu/~rstan/ec/catalan.pdf">Exercises on Catalan and Related Numbers</a>
%Y Cf. A080979. a(n) = A080300(A080981(n)). See comment at A080981. Complement of A080970.
%K nonn
%O 0,3
%A _Antti Karttunen_, Mar 02 2003
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