-27371

Appears in sequences

• Expansion of 1/(1 - 3*x + 4*x^2).at n=16A049072
• Lucas and Lehmer numbers with parameters (1 +- sqrt(-7))/2.at n=34A107920
• Row sums of the Riordan array (1-4x+4x^2, x(1-2x)) (A167431).at n=31A167433
• a(0)=1, a(1)=1; thereafter a(n) = -a(n-1) - 2*a(n-2).at n=32A169998