Triangle T(n,m), [x*A(x)]^m=sum(n>=m T(n,m)*x^n), where A(x) satisfies x*A(x)^2= -(2*x*A(x)+sqrt(1-4*x*A(x))-1)/(4*x*A(x)+sqrt(1-4*x*A(x))-1).
A188109
Triangle T(n,m), [x*A(x)]^m=sum(n>=m T(n,m)*x^n), where A(x) satisfies x*A(x)^2= -(2*x*A(x)+sqrt(1-4*x*A(x))-1)/(4*x*A(x)+sqrt(1-4*x*A(x))-1).
Terms
- a(0) =1a(1) =3a(2) =1a(3) =19a(4) =6a(5) =1a(6) =152a(7) =47a(8) =9a(9) =1a(10) =1367a(11) =418a(12) =84a(13) =12a(14) =1a(15) =13195a(16) =4007a(17) =825a(18) =130a(19) =15a(20) =1a(21) =133556a(22) =40368a(23) =8433a(24) =1400a(25) =185a(26) =18a(27) =1a(28) =1398696a(29) =421332
External references
- oeis: A188109