Number of (n+3) X 5 0..1 matrices with each 4 X 4 subblock idempotent.

Terms

a(0) =370a(1) =340a(2) =428a(3) =517a(4) =611a(5) =775a(6) =1044a(7) =1383a(8) =1808a(9) =2373a(10) =3190a(11) =4323a(12) =5868a(13) =7946a(14) =10825a(15) =14809a(16) =20317a(17) =27872a(18) =38285a(19) =52646a(20) =72495a(21) =99863a(22) =137615a(23) =189693a(24) =261595a(25) =360821a(26) =497771a(27) =686759a(28) =947616a(29) =1307656