Number of length n+6 0..1 arrays with at most one downstep in every 6 consecutive neighbor pairs.

Terms

a(0) =64a(1) =98a(2) =156a(3) =257a(4) =428a(5) =705a(6) =1134a(7) =1797a(8) =2848a(9) =4560a(10) =7384a(11) =12021a(12) =19508a(13) =31444a(14) =50432a(15) =80828a(16) =129904a(17) =209549a(18) =338650a(19) =546939a(20) =881612a(21) =1418697a(22) =2281990a(23) =3673412a(24) =5919888a(25) =9546459a(26) =15393334a(27) =24807246a(28) =39956320a(29) =64344494