G.f. satisfies A(A(x)) = x + 4*x^3, where A(x) = Sum_{n>=0} a(n)*x^(2*n+1).
A107099
G.f. satisfies A(A(x)) = x + 4*x^3, where A(x) = Sum_{n>=0} a(n)*x^(2*n+1).
Terms
- a(0) =1a(1) =2a(2) =-6a(3) =36a(4) =-266a(5) =2028a(6) =-13596a(7) =50088a(8) =566694a(9) =-16598580a(10) =232284876a(11) =-1912070088a(12) =631155132a(13) =239439857272
External references
- oeis: A107099