a(n) = 4*a(n-1) + 12*a(n-2), n>2 with a(0)=1, a(1)=1, a(2)=7.
A154968
a(n) = 4*a(n-1) + 12*a(n-2), n>2 with a(0)=1, a(1)=1, a(2)=7.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =40a(4) =244a(5) =1456a(6) =8752a(7) =52480a(8) =314944a(9) =1889536a(10) =11337472a(11) =68024320a(12) =408146944a(13) =2448879616a(14) =14693281792a(15) =88159682560a(16) =528958111744
External references
- oeis: A154968