Number of (n+4) X 9 0..1 matrices with each 5 X 5 subblock idempotent.

Terms

a(0) =4405a(1) =1938a(2) =2136a(3) =2429a(4) =2700a(5) =2926a(6) =3540a(7) =4514a(8) =5773a(9) =7247a(10) =8885a(11) =11074a(12) =14173a(13) =18466a(14) =24167a(15) =31439a(16) =40832a(17) =53255a(18) =69901a(19) =92177a(20) =121653a(21) =160449a(22) =211594a(23) =279310a(24) =369226a(25) =488541a(26) =646574a(27) =855673a(28) =1132408a(29) =1498978