G.f. A(x) satisfies x = Sum_{n>=1} A( x^n*(1-x)^(2*n) ).
A380551
G.f. A(x) satisfies x = Sum_{n>=1} A( x^n*(1-x)^(2*n) ).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =28a(4) =142a(5) =720a(6) =3875a(7) =21288a(8) =120168a(9) =690546a(10) =4032014a(11) =23840724a(12) =142498691a(13) =859512043a(14) =5225263875a(15) =31983651216a(16) =196947587822
External references
- oeis: A380551