Triangle of coefficients, read by rows, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (1+x) - x^2*(1+x)^2 + xy*f(x,y)^2.

A086612

Triangle of coefficients, read by rows, where T(n,k) is the coefficient of x^n*y^k in f(x,y) that satisfies f(x,y) = (1+x) - x^2*(1+x)^2 + xy*f(x,y)^2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =-1a(4) =2a(5) =2a(6) =-2a(7) =-1a(8) =6a(9) =5a(10) =-1a(11) =-6a(12) =0a(13) =20a(14) =14a(15) =0a(16) =-5a(17) =-22a(18) =10a(19) =70a(20) =42a(21) =0a(22) =2a(23) =-30a(24) =-80a(25) =70a(26) =252a(27) =132a(28) =0a(29) =6

External references