%I #6 Nov 09 2015 16:14:21
%S 5,8,13,15,16,20,40,50,56,60,83,85,92,134,137,138,198,204,216,268,272,
%T 289,292,308,312,328,332,344,348,360,367,382,392,396,412,416,436,438,
%U 498,533,538,620,632,636,640,664,666,694,700,704,720,776,792,814,816,828,922,936,940,956,965,966,969,1032
%N Row 3 of A263255.
%C Numbers n for which A263254(n) = 3. Numbers that are three edges removed from the infinite trunk (A259934) of the tree defined by edge-relation A049820(child) = parent.
%H Antti Karttunen, <a href="/A263263/b263263.txt">Table of n, a(n) for n = 1..2047</a>
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A263263 (MATCHING-POS 1 0 (lambda (n) (= 3 (A263254 n)))))
%Y Cf. A049820, A259934, A263254, A263255.
%K nonn
%O 1,1
%A _Antti Karttunen_, Nov 07 2015