Number of (n+4) X 7 0..1 matrices with each 5 X 5 subblock idempotent.

Terms

a(0) =2662a(1) =1494a(2) =1636a(3) =1896a(4) =2136a(5) =2354a(6) =2862a(7) =3701a(8) =4814a(9) =6134a(10) =7579a(11) =9522a(12) =12249a(13) =16025a(14) =21050a(15) =27502a(16) =35816a(17) =46815a(18) =61511a(19) =81188a(20) =107258a(21) =141592a(22) =186820a(23) =246722a(24) =326234a(25) =431740a(26) =571497a(27) =756452a(28) =1001216a(29) =1325438