Number of length n+5 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.

Terms

a(0) =64a(1) =128a(2) =256a(3) =512a(4) =956a(5) =1656a(6) =2693a(7) =4158a(8) =6153a(9) =8792a(10) =12202a(11) =16524a(12) =21914a(13) =28544a(14) =36603a(15) =46298a(16) =57855a(17) =71520a(18) =87560a(19) =106264a(20) =127944a(21) =152936a(22) =181601a(23) =214326a(24) =251525a(25) =293640a(26) =341142a(27) =394532a(28) =454342a(29) =521136