G.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-x^2)^n) / (1 + A002203(n)*x^n + (-x^2)^n) where A002203(n) is the companion Pell numbers.
A204384
G.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-x^2)^n) / (1 + A002203(n)*x^n + (-x^2)^n) where A002203(n) is the companion Pell numbers.
Terms
- a(0) =1a(1) =-4a(2) =-4a(3) =0a(4) =68a(5) =56a(6) =0a(7) =0a(8) =4a(9) =-5572a(10) =-4616a(11) =0a(12) =0a(13) =-328a(14) =0a(15) =0a(16) =2663428a(17) =2206456a(18) =-4a(19) =0a(20) =156808a(21) =0a(22) =0a(23) =0a(24) =0a(25) =-7420309452a(26) =-6147187208a(27) =0a(28) =0a(29) =-436867144
External references
- oeis: A204384