6984234

Appears in sequences

• a(n) = T(n,n-1), where T is array defined in A025564.at n=16A025565
• Sum_{i=0..n} Sum_{j=0..i} a(j) * a(i-j) = (-3)^n.at n=16A085455
• Transform of C(n+1,floor((n+1)/2)) by A178112.at n=31A178113