a(n) = Sum_{k=0..n} (-1)^k*F(k-1)*F(k)*F(k+1)/2, where F(n) is the Fibonacci number A000045(n).

A363753

a(n) = Sum_{k=0..n} (-1)^k*F(k-1)*F(k)*F(k+1)/2, where F(n) is the Fibonacci number A000045(n).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =-2a(4) =13a(5) =-47a(6) =213a(7) =-879a(8) =3762a(9) =-15873a(10) =67342a(11) =-285098a(12) =1207966a(13) =-5116586a(14) =21674919a(15) =-91815276a(16) =388937619a(17) =-1647563169a(18) =6979194475a(19) =-29564334305a(20) =125236542640a(21) =-530510487155

External references