-56143

Appears in sequences

• a(0)=1, a(1)=1; thereafter a(n) = -a(n-1) - 2*a(n-2).at n=31A169998
• a(n) = 5*a(n-1) - 8*a(n-2), with a(0)=0, a(1)=1.at n=11A190969