a(n) = 3*a(n-1) - a(n-2) - 4*a(n-3) + 2*a(n-4) for n >= 4, where a(0) = 2, a(1) = 4, a(2) = 8, a(3) = 16, a(4) = 34, a(5) = 70 .
A288170
a(n) = 3*a(n-1) - a(n-2) - 4*a(n-3) + 2*a(n-4) for n >= 4, where a(0) = 2, a(1) = 4, a(2) = 8, a(3) = 16, a(4) = 34, a(5) = 70 .
Terms
- a(0) =2a(1) =4a(2) =8a(3) =16a(4) =34a(5) =70a(6) =144a(7) =292a(8) =590a(9) =1186a(10) =2380a(11) =4768a(12) =9546a(13) =19102a(14) =38216a(15) =76444a(16) =152902a(17) =305818a(18) =611652a(19) =1223320a(20) =2446658a(21) =4893334a(22) =9786688a(23) =19573396a(24) =39146814a(25) =78293650a(26) =156587324a(27) =313174672a(28) =626349370a(29) =1252698766
External references
- oeis: A288170