a(n) = a(n-1) + a(n-2) + a(n-3) - 2*a(n-4) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 5, a(3) = 8, a(4) = 11.

A288523

a(n) = a(n-1) + a(n-2) + a(n-3) - 2*a(n-4) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 5, a(3) = 8, a(4) = 11.

Terms

    a(0) =2a(1) =4a(2) =5a(3) =8a(4) =11a(5) =16a(6) =25a(7) =36a(8) =55a(9) =84a(10) =125a(11) =192a(12) =291a(13) =440a(14) =673a(15) =1020a(16) =1551a(17) =2364a(18) =3589a(19) =5464a(20) =8315a(21) =12640a(22) =19241a(23) =29268a(24) =44519a(25) =67748a(26) =103053a(27) =156784a(28) =238547a(29) =362888

External references