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%I #7 Mar 30 2012 18:39:22
%S 1,0,1,1,1,1,0,0,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,0,1,0,1,1,1,1,0,0,1,0,
%T 1,1,1,1,0,0,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,0,1,0,1,1,1,0,1,1,1,0,1,1,
%U 1,1,0,0,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,0,1,0,1,1,1,1,0,0,1,0,1,1,1,1,0,0,1
%N a(n) = A087659(n) mod 2.
%F a(n)=hypergeom([ -n, (n+4)/2, (n+5)/2], [3, 2], -4) mod 2; a(8k)=1, a(8k+1)=0, a(8k+2)=1 a(8k+3)=0, a(8k+4)=0, a(8k+5)= 035263(k+1), a(8k+6)=1-035263(k+1), a(8k+7)=A035263(k+1)
%o (PARI) a(n)= sum(i=0,n,2*binomial(n,i)*(n+2*i+3)!/((i+1)!*(i+2)!*(n+3)!))%2
%K nonn
%O 0,1
%A _Benoit Cloitre_, Mar 11 2004
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