Number of (n+4) X 10 0..2 matrices with each 5 X 5 subblock idempotent.

Terms

a(0) =43489a(1) =24252a(2) =28949a(3) =31623a(4) =33115a(5) =34032a(6) =42214a(7) =55189a(8) =70669a(9) =87402a(10) =104808a(11) =130151a(12) =168223a(13) =221528a(14) =291318a(15) =378265a(16) =490305a(17) =640166a(18) =843080a(19) =1115531a(20) =1474675a(21) =1945604a(22) =2566138a(23) =3389329a(24) =4484713a(25) =5938982a(26) =7863920a(27) =10409131a(28) =13777271