G.f. satisfies A(x) = Sum_{n>=0} x^n * (1 - A(x)^(2*n+2))/(1 - A(x)^2).
A199475
G.f. satisfies A(x) = Sum_{n>=0} x^n * (1 - A(x)^(2*n+2))/(1 - A(x)^2).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =34a(4) =195a(5) =1225a(6) =8146a(7) =56336a(8) =401005a(9) =2918308a(10) =21614216a(11) =162385693a(12) =1234515922a(13) =9479336440a(14) =73410868630a(15) =572719097908
External references
- oeis: A199475