-43690

Appears in sequences

• Expansion of (1-x)/(1+x+2*x^2+2*x^3).at n=34A078052
• A generalized Jacobsthal sequence.at n=16A083944
• a(n)= -3a(n-1) -3a(n-2)-2a(n-3), a(0)=1, a(1)=-2, a(2)=2.at n=17A131562
• First differences of A133730.at n=35A141416
• G.f.: (1+x)/(1+x-2*x^2).at n=17A151575
• a(n) = Sum_{k=0..n} (-2)^k * |(n - k | k)|, where (a | b) denotes the Kronecker symbol.at n=16A367545