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a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence).
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%I #3 Mar 30 2012 18:55:59

%S 1,3,13,18,42,57,106,129,212,244,362,413,583,649,866,960,1244,1356,

%T 1718,1848,2279,2447,2970,3163,3787,4006,4721,4987,5822,6117,7054,

%U 7407,8477,8866,10083,10505,11847,12335,13838,14368,16005,16611,18426,19074,21078

%N a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence).

%K nonn

%O 1,2

%A _Clark Kimberling_