a(n) = a(n-1) + a(n-2) + 3*a(n-4) - 2*a(n-5) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 8, a(3) = 13, a(4) = 26.

A288925

a(n) = a(n-1) + a(n-2) + 3*a(n-4) - 2*a(n-5) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 8, a(3) = 13, a(4) = 26.

Terms

    a(0) =2a(1) =4a(2) =8a(3) =13a(4) =26a(5) =47a(6) =89a(7) =159a(8) =300a(9) =548a(10) =1021a(11) =1868a(12) =3471a(13) =6383a(14) =11821a(15) =21766a(16) =40264a(17) =74237a(18) =137198a(19) =253091a(20) =467549a(21) =862823a(22) =1593492a(23) =2941192a(24) =5431149a(25) =10025712a(26) =18511691a(27) =34173995a(28) =63096749a(29) =116485582

External references