Alternating sum of the squares of the first n Fibonacci numbers.

Terms

a(0) =0a(1) =-1a(2) =0a(3) =-4a(4) =5a(5) =-20a(6) =44a(7) =-125a(8) =316a(9) =-840a(10) =2185a(11) =-5736a(12) =15000a(13) =-39289a(14) =102840a(15) =-269260a(16) =704909a(17) =-1845500a(18) =4831556a(19) =-12649205a(20) =33116020a(21) =-86698896a(22) =226980625a(23) =-594243024a(24) =1555748400a(25) =-4073002225a(26) =10663258224a(27) =-27916772500a(28) =73087059221a(29) =-191344405220