If n mod 2 = 0 then 2^n*3^(n-1)+2^(n+1)*3^(n/2-1) otherwise 2^n*3^(n-1)+2^n*3^((n-1)/2).
A232493
If n mod 2 = 0 then 2^n*3^(n-1)+2^(n+1)*3^(n/2-1) otherwise 2^n*3^(n-1)+2^n*3^((n-1)/2).
Terms
- a(0) =1a(1) =4a(2) =20a(3) =96a(4) =528a(5) =2880a(6) =16704a(7) =96768a(8) =573696a(9) =3400704a(10) =20321280a(11) =121430016a(12) =727584768a(13) =4359536640a(14) =26145275904a(15) =156799991808a(16) =940656623616
External references
- oeis: A232493