Number of (n+4) X 9 0..2 matrices with each 5 X 5 subblock idempotent.

Terms

a(0) =39001a(1) =23453a(2) =28058a(3) =30723a(4) =32204a(5) =33115a(6) =41120a(7) =53862a(8) =69089a(9) =85561a(10) =102702a(11) =127605a(12) =165006a(13) =217389a(14) =285998a(15) =371501a(16) =481659a(17) =628969a(18) =828412a(19) =1096213a(20) =1449265a(21) =1912222a(22) =2522235a(23) =3331436a(24) =4408182a(25) =5837723a(26) =7729963a(27) =10231957a(28) =13542892