Square table, read by antidiagonals, of coefficients of x^k in the n-th self-composition of the g.f. of A120009, so that: T(n,k) = [x^k] { (x-x^2) o x/(1-n*x) o (1-sqrt(1-4*x))/2 } for n>=1, k>=1.
A120013
Square table, read by antidiagonals, of coefficients of x^k in the n-th self-composition of the g.f. of A120009, so that: T(n,k) = [x^k] { (x-x^2) o x/(1-n*x) o (1-sqrt(1-4*x))/2 } for n>=1, k>=1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =3a(8) =4a(9) =0a(10) =1a(11) =4a(12) =9a(13) =6a(14) =-6a(15) =1a(16) =5a(17) =16a(18) =24a(19) =-4a(20) =-33a(21) =1a(22) =6a(23) =25a(24) =60a(25) =42a(26) =-100a(27) =-143a(28) =1a(29) =7
External references
- oeis: A120013