Number of (n+2) X 8 0..1 matrices with each 3 X 3 subblock idempotent.

Terms

a(0) =418a(1) =351a(2) =451a(3) =551a(4) =740a(5) =992a(6) =1298a(7) =1742a(8) =2382a(9) =3267a(10) =4530a(11) =6362a(12) =9003a(13) =12826a(14) =18395a(15) =26514a(16) =38360a(17) =55674a(18) =81001a(19) =118063a(20) =172323a(21) =251789a(22) =368191a(23) =538722a(24) =788583a(25) =1154705a(26) =1691212a(27) =2477429a(28) =3629612a(29) =5318141