a(1) = 4; a(n) = if n == 2 mod 3 then a(n-1)/2, if n == 0 mod 3 then a(n-1)*2, if n == 1 mod 3 then a(n-1)*3.
A085689
a(1) = 4; a(n) = if n == 2 mod 3 then a(n-1)/2, if n == 0 mod 3 then a(n-1)*2, if n == 1 mod 3 then a(n-1)*3.
Terms
- a(0) =4a(1) =2a(2) =4a(3) =12a(4) =6a(5) =12a(6) =36a(7) =18a(8) =36a(9) =108a(10) =54a(11) =108a(12) =324a(13) =162a(14) =324a(15) =972a(16) =486a(17) =972a(18) =2916a(19) =1458a(20) =2916a(21) =8748a(22) =4374a(23) =8748a(24) =26244a(25) =13122a(26) =26244a(27) =78732a(28) =39366a(29) =78732
External references
- oeis: A085689