Number of (n+4) X 10 0..1 matrices with each 5 X 5 subblock idempotent.

Terms

a(0) =5385a(1) =2110a(2) =2354a(3) =2646a(4) =2926a(5) =3158a(6) =3819a(7) =4858a(8) =6192a(9) =7747a(10) =9470a(11) =11789a(12) =15081a(13) =19640a(14) =25686a(15) =33386a(16) =43335a(17) =56505a(18) =74162a(19) =97792a(20) =129048a(21) =170178a(22) =224402a(23) =296206a(24) =391562a(25) =518095a(26) =685678a(27) =907404a(28) =1200852a(29) =1589573