G.f. A(x) satisfies A(x) = sqrt( (1 + 2*x*A(x)^2) * (1 + 2*x*A(x)) ).
A379327
G.f. A(x) satisfies A(x) = sqrt( (1 + 2*x*A(x)^2) * (1 + 2*x*A(x)) ).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =88a(5) =372a(6) =1634a(7) =7382a(8) =34078a(9) =160034a(10) =762078a(11) =3671178a(12) =17858476a(13) =87599696a(14) =432804190a(15) =2151867226a(16) =10758455224a(17) =54053627604a(18) =272780539742
External references
- oeis: A379327