Alternating sum of the squares of the first n Fibonacci numbers with index divisible by 3.

A156090

Alternating sum of the squares of the first n Fibonacci numbers with index divisible by 3.

Terms

    a(0) =0a(1) =-4a(2) =60a(3) =-1096a(4) =19640a(5) =-352460a(6) =6324596a(7) =-113490320a(8) =2036501104a(9) =-36543529620a(10) =655747031980

External references