Generalized Fibonacci numbers A_{n,3}.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =0a(5) =2a(6) =1a(7) =3a(8) =2a(9) =6a(10) =4a(11) =9a(12) =8a(13) =18a(14) =16a(15) =32a(16) =32a(17) =61a(18) =64a(19) =115a(20) =128a(21) =224a(22) =258a(23) =431a(24) =520a(25) =850a(26) =1050a(27) =1673a(28) =2128a(29) =3328