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%I #10 Oct 11 2015 10:51:26
%S 1,3,4,6,8,10,15,16,18,21,30,31,32,36,37,39,44,45,49,50,51,53,54,55,
%T 58,60,62,65,68,71,72,73,74,75,76,80,83,84,90,91,93,96,109,112,117,
%U 122,123,124,126,127,131,134,135,137,141,142,144,145,147,149,152,154,155,161,162,165,166,170,178,187,189,190,191,193,195,199,201,203,205,211,212,213,219,223,225
%N Indices of nonbranching nodes in the infinite trunk (A259934) of the tree generated by edge-relation A049820(child) = parent
%C Positions of zeros in A262890. Positions of ones in A262891.
%C Sequence b(n) = A262508(n)-1 = 9235, 9236, 9237, 9246, 9247, 9329, 9330, 9352, 9355, ..., is a subsequence.
%H Antti Karttunen, <a href="/A262892/b262892.txt">Table of n, a(n) for n = 1..4085</a>
%F Other identities. For all n >= 1:
%F A262897(n) = A259934(a(n)) = A262896(a(n)).
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A262892 (ZERO-POS 1 0 (COMPOSE -1+ A262891)))
%Y Cf. A049820, A259934, A262890, A262891, A262896.
%Y Cf. A262897 (nonbranching nodes themselves).
%Y Cf. A262508.
%K nonn
%O 1,2
%A _Antti Karttunen_, Oct 04 2015
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