a(n) = 2*a(n-1) + a(n-2) - 4*a(n-3) + 2*a(n-4) + a(n-5) -2*a(n-6) + a(n-7) for n >= 7, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 11, a(4) = 18, a(5) = 30, a(6) = 47.
A289077
a(n) = 2*a(n-1) + a(n-2) - 4*a(n-3) + 2*a(n-4) + a(n-5) -2*a(n-6) + a(n-7) for n >= 7, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 11, a(4) = 18, a(5) = 30, a(6) = 47.
Terms
- a(0) =2a(1) =4a(2) =7a(3) =11a(4) =18a(5) =30a(6) =47a(7) =74a(8) =114a(9) =176a(10) =269a(11) =411a(12) =625a(13) =950a(14) =1441a(15) =2185a(16) =3310a(17) =5013a(18) =7589a(19) =11487a(20) =17384a(21) =26306a(22) =39804a(23) =60225a(24) =91120a(25) =137860a(26) =208573a(27) =315552a(28) =477400a(29) =722254
External references
- oeis: A289077