1045*6^n/27-513*2^(n-2)-2072*3^(n-3)+670*(-1)^n*3^(n-3)+254*(-1)^(n+1), n>1.
A121804
1045*6^n/27-513*2^(n-2)-2072*3^(n-3)+670*(-1)^n*3^(n-3)+254*(-1)^(n+1), n>1.
Terms
- a(0) =0a(1) =159a(2) =4846a(3) =43648a(4) =272432a(5) =1759444a(6) =10596296a(7) =64633588a(8) =387979832a(9) =2337067204a(10) =14023337096a(11) =84221417428a(12) =505334268632
External references
- oeis: A121804