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%I #8 Oct 09 2014 18:54:09
%S 1,1,2,3,2,4,9,6,4,8,27,18,12,8,16,81,54,36,24,16,32,243,162,108,72,
%T 48,32,64,729,486,324,216,144,96,64,128,2187,1458,972,648,432,288,192,
%U 128,256,6561,4374,2916,1944,1296,864,576,384,256,512,19683,13122
%N Riordan array ((1-2x)/(1-3x), 2x).
%C Mirror of A153279.
%F Sum_{k, 0<=k<=n} T(n,k) = 3^n = A000244(n).
%F T(n,k) = A133494(n-k)*2^k.
%F T(2n,n) = A167747(n).
%e Triangle begins:
%e 1
%e 1, 2
%e 3, 2, 4
%e 9, 6, 4, 8
%e 27, 18, 12, 8, 16
%e 81, 54, 36, 24, 16, 32
%e 243, 162, 108, 72, 48, 32, 64
%e Production matrix begins:
%e 1, 2
%e 1, 0, 2
%e 1, 0, 0, 2
%e 1, 0, 0, 0, 2
%e 1, 0, 0, 0, 0, 2
%e 1, 0, 0, 0, 0, 0, 2
%e 1, 0, 0, 0, 0, 0, 0, 2
%Y Cf. A000079, A000244, A133494, A153279, A167747.
%K nonn,tabl
%O 0,3
%A _Philippe Deléham_, Sep 26 2014
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