G.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-1)^n*x^(2*n)) where A002203(n) is the companion Pell numbers.

A204382

G.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-1)^n*x^(2*n)) where A002203(n) is the companion Pell numbers.

Terms

    a(0) =1a(1) =-2a(2) =-7a(3) =-2a(4) =1a(5) =82a(6) =34a(7) =464a(8) =198a(9) =-82a(10) =-1a(11) =0a(12) =-39208a(13) =-16238a(14) =6725a(15) =-551614a(16) =-228486a(17) =95120a(18) =0a(19) =82a(20) =6726a(21) =0a(22) =263673800a(23) =109216786a(24) =-45239073a(25) =0a(26) =8957108166a(27) =3706940654a(28) =-1536796802a(29) =-551614

External references