Position reached by frog in A038029. A038026(A038029(n)).

Terms

a(0) =2a(1) =19a(2) =19a(3) =43a(4) =103a(5) =43a(6) =137a(7) =149a(8) =103a(9) =83a(10) =71a(11) =233a(12) =137a(13) =149a(14) =373a(15) =389a(16) =479a(17) =1021a(18) =233a(19) =647a(20) =691a(21) =487a(22) =197a(23) =419a(24) =2459a(25) =619a(26) =389a(27) =1543a(28) =1021a(29) =647