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a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = A001950 (upper Wythoff sequence).
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%I #4 Mar 30 2012 18:55:54

%S 2,5,7,10,20,25,41,48,56,64,86,98,126,138,173,188,204,220,261,280,325,

%T 347,399,422,480,505,531,558,623,651,721,753,829,863,943,980,1066,

%U 1105,1144,1184,1278,1319,1419,1463,1567,1615,1723,1774,1889,1941,2061,2115,2170

%N a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = A001950 (upper Wythoff sequence).

%K nonn

%O 1,1

%A _Clark Kimberling_