G.f. A(x) satisfies: A(x) = 1 + x + x^2 * A(x/(1 + 4*x)) / (1 + 4*x).
A351185
G.f. A(x) satisfies: A(x) = 1 + x + x^2 * A(x/(1 + 4*x)) / (1 + 4*x).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =-3a(4) =9a(5) =-31a(6) =153a(7) =-1075a(8) =8689a(9) =-72031a(10) =605201a(11) =-5282051a(12) =49239225a(13) =-497094079a(14) =5410919273a(15) =-62597718643a(16) =759331611489
External references
- oeis: A351185