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%I #7 Jul 21 2019 07:45:17
%S 1,1,1,1,1,1,2,3,4,6,10,16,25,39,67,110,177,289,494,828,1369,2274,
%T 3927,6662,11172,18834,32657,55915,94911,161435,281479,484998,829467,
%U 1422452,2486150,4306602,7414386,12783897,22416571,38987381
%N a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(2)=1.
%K nonn
%O 1,7
%A _Clark Kimberling_
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