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A051734 a(n)=sum(min(i+1,n-i)*a(i)*(-1)^i,i=0..n-1), a(0)=1. 0

%I

%S 1,1,0,-1,0,1,1,2,0,-2,-2,-4,-1,1,1,2,3,7,4,5,-1,-8,-5,-7,-6,-11,-4,

%T -1,4,13,8,11,5,4,-4,-16,-5,1,2,5,8,19,12,17,-3,-26,-18,-28,-17,-23,0,

%U 23,12,13,5,2,-4,-14,-14,-28,-1,25,18,29,22,37,10,-7,-13,-32,-15,-13,-14

%N a(n)=sum(min(i+1,n-i)*a(i)*(-1)^i,i=0..n-1), a(0)=1.

%K easy,sign

%O 0,8

%A Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 06 1999

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Last modified June 21 15:37 EDT 2021. Contains 345364 sequences. (Running on oeis4.)