a0= 2 , a1= -1

please solve step by step . no need of programing .

just need to know how to get 17th term

A dequena an is grover witt the folloro rule. an+2=2an+1+3an,a0=2,a1=1 Write a prigrem to cenpult a12. a0=a1a1=1a2=a1+a2=1+0=1a5=a2+a1=1+(1)=2a4=a3+a2=2+(1)=21=3a5=a4+a2=32=5a6=a5+a4=53=8a7=a6+a5=8+(5)=13=