I am going to solve ODE by Differential Transform method by using the code in Maple
F(0):=0; F(1)=-0.2;
for K from 0 to 4 do F(k+2)=1/(k+1)(k+2)(F(k+1)+Dirac(k-4)+3*Dirac(k-0) end do
it gives the output
`F(2)=-1+3/2 Dirac(0)
F(3)=-0.067+1/4 Dirac(0)`
what I can do to get the value of Dirac(0)