a(n) is the product of all parts in negaFibonacci representation of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =-5a(5) =5a(6) =5a(7) =10a(8) =10a(9) =39a(10) =-39a(11) =-39a(12) =-13a(13) =13a(14) =13a(15) =26a(16) =26a(17) =-65a(18) =65a(19) =65a(20) =130a(21) =130a(22) =-816a(23) =816a(24) =816a(25) =272a(26) =-272a(27) =-272a(28) =-544a(29) =-544