a(n) = 3*a(n-1) - 3*a(n-2) + 2*a(n-3) - 2*a(n-4) + a(n-5) for n >= 10, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 20, a(5) = 32, a(6) = 50, a(7) = 77, a(8) = 116, a(9) = 174.
A289115
a(n) = 3*a(n-1) - 3*a(n-2) + 2*a(n-3) - 2*a(n-4) + a(n-5) for n >= 10, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 20, a(5) = 32, a(6) = 50, a(7) = 77, a(8) = 116, a(9) = 174.
Terms
- a(0) =2a(1) =4a(2) =7a(3) =12a(4) =20a(5) =32a(6) =50a(7) =77a(8) =116a(9) =174a(10) =260a(11) =386a(12) =571a(13) =843a(14) =1242a(15) =1827a(16) =2685a(17) =3943a(18) =5787a(19) =8490a(20) =12452a(21) =18259a(22) =26770a(23) =39244a(24) =57526a(25) =84320a(26) =123589a(27) =181141a(28) =265488a(29) =389105
External references
- oeis: A289115