Multiply previous term by 6 and reverse.

Terms

a(0) =1a(1) =6a(2) =63a(3) =873a(4) =8325a(5) =5994a(6) =46953a(7) =817182a(8) =2903094a(9) =46581471a(10) =628884972a(11) =2389033773a(12) =83620243341a(13) =640064127105a(14) =362674830483