Generalized Somos-5 sequence a(n) = (a(n-1)*a(n-4) + a(n-2)*a(n-3))/a(n-5) = -a(-n), a(1) = 1, a(2) = -1, a(3) = a(4) = 1, a(5) = -7.

A360381

Generalized Somos-5 sequence a(n) = (a(n-1)*a(n-4) + a(n-2)*a(n-3))/a(n-5) = -a(-n), a(1) = 1, a(2) = -1, a(3) = a(4) = 1, a(5) = -7.

Terms

    a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =1a(5) =-7a(6) =8a(7) =-1a(8) =-57a(9) =391a(10) =-455a(11) =-2729a(12) =22352a(13) =-175111a(14) =47767a(15) =8888873a(16) =-69739671a(17) =565353361a(18) =3385862936a(19) =-195345149609

External references