Generalized Fibonacci numbers A_{n,4}.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =0a(5) =2a(6) =0a(7) =3a(8) =1a(9) =6a(10) =2a(11) =9a(12) =4a(13) =18a(14) =8a(15) =30a(16) =16a(17) =56a(18) =32a(19) =101a(20) =64a(21) =191a(22) =128a(23) =351a(24) =256a(25) =668a(26) =512a(27) =1257a(28) =1026a(29) =2402