a(n) = (a(n-1) * a(n-3) + (-1)^n * a(n-2)^2) / a(n-4), with a(0) = 0, a(1) = -1, a(2) = a(3) = a(4) = 1, a(9) = 3.
A247369
a(n) = (a(n-1) * a(n-3) + (-1)^n * a(n-2)^2) / a(n-4), with a(0) = 0, a(1) = -1, a(2) = a(3) = a(4) = 1, a(9) = 3.
Terms
- a(0) =0a(1) =-1a(2) =1a(3) =1a(4) =1a(5) =0a(6) =1a(7) =1a(8) =1a(9) =3a(10) =4a(11) =-5a(12) =1a(13) =-7a(14) =9a(15) =8a(16) =25a(17) =-23a(18) =49a(19) =87a(20) =16a(21) =295a(22) =529a(23) =-903a(24) =841a(25) =-1256a(26) =3481a(27) =-1495a(28) =16641a(29) =-44341
External references
- oeis: A247369