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%I #7 Feb 25 2015 14:52:07
%S 3,-2,1,3,7,16,40,111,327,984,2984,9120,28156,87830,276442,876443,
%T 2795523,8963668,28877692,93433104,303474772,989159058,3234373630,
%U 10606540108,34874855416,114951540690,379751773694,1257173264286,4170000218994
%N a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-3)*a(3) for n >= 4.
%F Conjecture: n*a(n) +3*(-2*n+3)*a(n-1) +13*(n-3)*a(n-2) +8*(-2*n+9)*a(n-3) +4*(n-6)*a(n-4)=0. - _R. J. Mathar_, Feb 25 2015
%K sign
%O 1,1
%A _Clark Kimberling_
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