If n mod 2 = 0 then 2^(n-1)*(3^n+3*3^(n/2)-2) otherwise 2^(n-1)*(3^n+5*3^((n-1)/2)-2).
A232494
If n mod 2 = 0 then 2^(n-1)*(3^n+3*3^(n/2)-2) otherwise 2^(n-1)*(3^n+5*3^((n-1)/2)-2).
Terms
- a(0) =1a(1) =6a(2) =32a(3) =160a(4) =848a(5) =4576a(6) =25856a(7) =148480a(8) =870656a(9) =5142016a(10) =30605312a(11) =182640640a(12) =1092866048a(13) =6545268736a(14) =39235813376a(15) =235271618560
External references
- oeis: A232494