G.f.: 1 + 1^2*x/(1 + 2^2*x/(1 + 3^2*x/(1 + 4^2*x/(1 + 5^2*x/(1 + ...))))).

A343429

G.f.: 1 + 1^2*x/(1 + 2^2*x/(1 + 3^2*x/(1 + 4^2*x/(1 + 5^2*x/(1 + ...))))).

Terms

    a(0) =1a(1) =1a(2) =-4a(3) =52a(4) =-1252a(5) =47380a(6) =-2589892a(7) =193480948a(8) =-18967658404

External references