For my research project, I am looking for an analytical solution of the following recurrence relation,
(k+3)Ck+(2k+5)(a)Ck+1+(k+2)(a2+b2)Ck+2=0
subject to the initial conditions,
C0=1
C1=-3a/(a2+b2)
Is there any way to solve it analytically? Can you suggest a book on solving this kind of recurrence equations?