-210035680

Appears in sequences

• a(n) = 5*a(n-1) - 9*a(n-2), with a(0)=0, a(1)=1.at n=18A190970
• a(n) = -a(n-1) - 3*a(n-2) with n>1, a(0)=0, a(1)=1.at n=36A214733