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%I #5 Jul 26 2017 09:28:30
%S 1,1,2,1,1,2,2,2,4,1,1,2,1,1,2,2,2,4,2,2,6,2,2,6,4,4,8,1,1,2,1,1,2,2,
%T 2,4,1,1,2,1,1,2,2,2,4,2,2,6,2,2,6,4,4,8,2,2,6,2,2,6,6,6,12,2,2,6,2,2,
%U 6,6,6,12,4,4,12,4,4,12,8,8,16,1,1,2,1,1,2,2,2,4,1,1,2,1,1,2,2,2,4,2,2,6,2,2,6,4,4,8,1,1,2,1
%N Filter based on 2-digits of base-3 expansion: a(n) = A278222(A289814(n)).
%H Antti Karttunen, <a href="/A290092/b290092.txt">Table of n, a(n) for n = 0..19683</a>
%F a(n) = A278222(A289814(n)).
%o (Scheme) (define (A290092 n) (A278222 (A289814 n)))
%Y Cf. A278222, A289814, A290091, A290093.
%K nonn
%O 0,3
%A _Antti Karttunen_, Jul 25 2017
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