T0=0,T1=1T_0=0,T_1=1T0=0,T1=1
Tn=2n+3n+3Tn−1+n−1n+2Tn−2 T_n= \frac{2n+3}{n+3} T_n-1 + \frac{n-1}{n+2}T_n-2Tn=n+32n+3Tn−1+n+2n−1Tn−2
