Consider the e.g.f. B(x,y) = Sum_{n>=0} Sum_{k=0..floor(n/2)} T(n,k) * x^(2*n-2*k) * y^(2*k) / (2*n)! and related functions A(x,y) and C(x,y), as defined in the Formula section. Sequence gives the triangular array of coefficients T(n,k) (n>=0, 0<=k<=floor(n/2)) of B(x,y).
A326798
Consider the e.g.f. B(x,y) = Sum_{n>=0} Sum_{k=0..floor(n/2)} T(n,k) * x^(2*n-2*k) * y^(2*k) / (2*n)! and related functions A(x,y) and C(x,y), as defined in the Formula section. Sequence gives the triangular array of coefficients T(n,k) (n>=0, 0<=k<=floor(n/2)) of B(x,y).
Terms
- a(0) =1a(1) =-1a(2) =1a(3) =0a(4) =-1a(5) =120a(6) =1a(7) =-672a(8) =0a(9) =-1a(10) =2160a(11) =-120960a(12) =1a(13) =-5280a(14) =1584000a(15) =0a(16) =-1a(17) =10920a(18) =-10250240a(19) =482786304a(20) =1a(21) =-20160a(22) =45427200a(23) =-11480268800a(24) =0a(25) =-1a(26) =34272a(27) =-157651200a(28) =124816613376a(30) =1
External references
- oeis: A326798