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%I #11 Jun 29 2023 20:02:42
%S 1,4,6,16,24,64,96,256,384,1024,1536,4096,6144,16384,24576,65536,
%T 98304,262144,393216,1048576,1572864,4194304,6291456,16777216,
%U 25165824,67108864,100663296,268435456,402653184,1073741824,1610612736,4294967296
%N Row sums of triangle A133571.
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0, 4).
%F Even-indexed terms, a(n) = 2^n; odd-indexed terms, a(n) = 2^(n-1) + 2^(n-2).
%F G.f.: -x*(4*x+1+2*x^2)/(2*x-1)/(2*x+1). - _R. J. Mathar_, Nov 14 2007
%e a(4) = 16 = sum or row 4 terms of triangle A133571: (5 + 5 + 5 + 1).
%e a(4) = 16 = 2^4.
%e a(7) = 96 = 2^6 + 2^5 = 64 + 32.
%Y Cf. A133571.
%K nonn,easy
%O 1,2
%A _Gary W. Adamson_, Sep 16 2007
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