-15012

Appears in sequences

• a(n) = Sum_{k=0..n} (-1)^k*F(k)*F(k+2), where F=A000045 (Fibonacci numbers).at n=11A214884
• a(n) = 6*a(n-1) - 9*a(n-2) + 3*a(n-3).at n=7A216757