a(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(0) = 1, a(1) = 1, a(2) = 0, a(3) = 1, a(6) = 2.
A247370
a(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(0) = 1, a(1) = 1, a(2) = 0, a(3) = 1, a(6) = 2.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =-1a(9) =7a(10) =10a(11) =13a(12) =9a(13) =37a(14) =40a(15) =133a(16) =369a(17) =877a(18) =-488a(19) =4429a(20) =9881a(21) =16869a(22) =46970a(23) =169039a(24) =65311a(25) =1875739a(26) =6659730a(27) =23387209a(28) =-7406159a(29) =265302649
External references
- oeis: A247370